Diary of a Racketaholic

The beauty of the Briffidi is the absolute simplicity. And it actually is rotating around the correct axis. I don’t think there is another machine on the market that rotates on the Y axis for twistweight. Which removes nearly all of the mounting error. Anyone?
That's the machine I use (don't own it sadly). Same calculation principle I think.

I thought mine sounded low compared to yours but my machine was still measuring my SW accurately. To be sure, I just recalibrated it. It was off slightly. My calibration rod should measure 297.1 and was now measuring 296. I recalibrated it and remeasured. The v2 Regna 98 I had measured just before calibrating went from 317 to 318 in SW. The TW measured yesterday was 12.84 and after recalibration it is now 12.87. So they were off slightly but not enough to make a significant change.
What generation are your regnas? Some Regna thread talks about one generation being around 14 and the other around 13-13.5 so maybe that explains it.
The regna I played definitely wasn't that low on TW.
Would be nice to have a briffidi to compare numbers between machines directly.


The FX500 Tour is a 98 inch frame with a 21/23/21 beam width. TennisWarehouse measured the SW at 317. Mine was way below that. I added 3g of lead at 12 to bring that SW up to around 320 strung. I don't know much about twist weights but this frame isn't that different than some of my others besides the beam being less box and more tubular.
Some threads on the forum said that it's in the 14-15 range so that's what I was going by. Guess that poster was wrong, my bad.

Yeah, the Briffidi is stupid easy to use. Just have to make sure you're careful when mounting and make sure there's no wobble. I just recalibrated and remeasured. My numbers were off by .03 so they went up a tiny bit.

I'm still in the 13 range. I think I just prefer lower twist weights than most. That would explain why I've always gravitated towards thinner beam control frames. And why I like frames that come through the air fast while others that folks on here have liked have felt sluggish to me. I never knew why but for me TW may have been the answer.

The only frames I still have to measure are my TF RS 300's. One of them is unstrung so I was going to wait but out of curiosity I may just measure the other 2. If my hypothesis is correct I'm thinking these will be in the 13.5 range.
Under 13 it gets rather unstable imo.

There is a new Head 4-in-1 with twistweight measurement about the handle axis. I haven't been able to find much about it, just some videos from Pickleball Central. It has a nice, new racquet clamp.

The only other one that I know of that measures twistweight is the MetorTune, but it uses the approximation of spinweight minus swingweight. The MetorTune should be repeatable, but the results will be lower than actual (unless they attempt to compensate via software). If you're curious, there's a blog post on my site that discusses twistweight from the difference between spinweight and swingweight. I found that error to be around -0.4 kg·cm² for a CAD model of a racquet.
I heard rather bad things about the Head 4-in-1 prototypes with regard to TW. A friend went to an ERSA conference and got that info from some stringer there.
 
That's the machine I use (don't own it sadly). Same calculation principle I think.


What generation are your regnas? Some Regna thread talks about one generation being around 14 and the other around 13-13.5 so maybe that explains it.
The regna I played definitely wasn't that low on TW.
Would be nice to have a briffidi to compare numbers between machines directly.



Some threads on the forum said that it's in the 14-15 range so that's what I was going by. Guess that poster was wrong, my bad.


Under 13 it gets rather unstable imo.


I heard rather bad things about the Head 4-in-1 prototypes with regard to TW. A friend went to an ERSA conference and got that info from some stringer there.
I have a v2 and multiple v3 Regnas. The beauty of the Regna is that for it's spec it is very stable. It's always been an anomaly to me in that regard. I really do think Yonex uses higher quality pre-reg strips or whatever they are called in the Regnas.

Are you sure they were talking about the Tour and not the standard FX500 because the beam on that one is quite different. Although I just checked and TWU has the TW of this one near 15. Although others have already posted in here that TWU numbers are off quite a bit. Still I'll measure this one again.

I wish I had something to compare these numbers against or knew actual TW of something that I could say 'I've played with this frame that had this TW and this one feels whatever in comparison to it' but I've never known any TW specs before. The SW on most of my frames is 320. I stay lower on the SW side now which would have some correlation to TW I'm assuming.
 
That's the machine I use (don't own it sadly). Same calculation principle I think.


What generation are your regnas? Some Regna thread talks about one generation being around 14 and the other around 13-13.5 so maybe that explains it.
The regna I played definitely wasn't that low on TW.
Would be nice to have a briffidi to compare numbers between machines directly.



Some threads on the forum said that it's in the 14-15 range so that's what I was going by. Guess that poster was wrong, my bad.


Under 13 it gets rather unstable imo.


I heard rather bad things about the Head 4-in-1 prototypes with regard to TW. A friend went to an ERSA conference and got that info from some stringer there.
No that Metortune is rotating on the X axis. But as BR says, it should be repeatable since you are turning the clamp vs moving the racket. Still, I think you need to be very precise in making sure you mount correctly on the SW measurement and have the racket exactly on edge vertical because moving the clamp won’t fix a racket not perpendicular.

Briffidi TW is rotating on the Y axis of the racket.
 
I have a v2 and multiple v3 Regnas. The beauty of the Regna is that for it's spec it is very stable. It's always been an anomaly to me in that regard. I really do think Yonex uses higher quality pre-reg strips or whatever they are called in the Regnas.

Are you sure they were talking about the Tour and not the standard FX500 because the beam on that one is quite different. Although I just checked and TWU has the TW of this one near 15. Although others have already posted in here that TWU numbers are off quite a bit. Still I'll measure this one again.

I wish I had something to compare these numbers against or knew actual TW of something that I could say 'I've played with this frame that had this TW and this one feels whatever in comparison to it' but I've never known any TW specs before. The SW on most of my frames is 320. I stay lower on the SW side now which would have some correlation to TW I'm assuming.
The Tw numbers for TW are hot garbage
 
No that Metortune is rotating on the X axis. But as BR says, it should be repeatable since you are turning the clamp vs moving the racket. Still, I think you need to be very precise in making sure you mount correctly on the SW measurement and have the racket exactly on edge vertical because moving the clamp won’t fix a racket not perpendicular.

Briffidi TW is rotating on the Y axis of the racket.
Ah sorry mixed up on how the Briffidi works.
From what I read or was told on the subject the Y axis method is very error prone as well if not more.
Who knows really...
 
I have a v2 and multiple v3 Regnas. The beauty of the Regna is that for it's spec it is very stable. It's always been an anomaly to me in that regard. I really do think Yonex uses higher quality pre-reg strips or whatever they are called in the Regnas.

Are you sure they were talking about the Tour and not the standard FX500 because the beam on that one is quite different. Although I just checked and TWU has the TW of this one near 15. Although others have already posted in here that TWU numbers are off quite a bit. Still I'll measure this one again.

I wish I had something to compare these numbers against or knew actual TW of something that I could say 'I've played with this frame that had this TW and this one feels whatever in comparison to it' but I've never known any TW specs before. The SW on most of my frames is 320. I stay lower on the SW side now which would have some correlation to TW I'm assuming.
Time to send a racquet around the world so we can compare measurements.
 
Took my 30yr old revelation for a hit. I haven’t touched it in at least a couple of years. And old poly in there and yet it played pretty good. Forgot what it’s like to hit 355+ grams. Those frames had lovely control and feel.
 
Ah sorry mixed up on how the Briffidi works.
From what I read or was told on the subject the Y axis method is very error prone as well if not more.
Who knows really...
Y axis is the best way since that is what twistweight is. but certainly error could be there for the wrong set up and method, due to the speed of oscillations or whatever. The measurement itself is smaller and any error is going to be a bigger risk of high percentage impact. the physics don’t lie, but we humans are a serious problem. I’m going to spend some time on Brian’s page reading his views on it , once a few work problems get out of the way.

ha, agree with sample sending and racket testing club! we can all check specs too.
 
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I measured the RS 300s - 13.63 and 13.81 is what I got for TW. Which explains why I think they are more stable but at the same time a bit slower than my other frames.
 
Y axis is the best way since that is what twistweight is. but certainly error could be there for the wrong set up and method, due to the speed of oscillations or whatever. The measurement itself is smaller and any error is going to be a bigger risk of high percentage impact. the physics don’t lie, but we humans are a serious problem. I’m going to spend some time on Brian’s page reading his views on it , once a few work problems get out of the way.

ha, agree with sample sending and racket testing club! we can all check specs too.
Yeah for sure but as far as I know any deviation from the axis messes the result up quite a bit. The briffidi way seems pretty good though.
I have UTs and C10 Pros sitting in my closet I could send around but I doubt anyone hasn't already hit with those.
I haven't :rolleyes:
Well once with a C10 pro demo but the string was horrible on that one.
 
I haven't :rolleyes:
Well once with a C10 pro demo but the string was horrible on that one.
PM me if you want to hit with the C10 Pro (assuming you're in the US). You can restring it with whatever you want. Right now it has slightly used Cyclone in it. My only ask is hit with it all you want but try not to scrape, etc. the ground with it. I offered to let @SupahMan5000 borrow the Regna but he said he has to scrape the ground so it was a no go.

Are you able to check SW and TW measurements to compare them against mine?
 
Just got Vcore 95 2021 version. It’s beast of a racquet with some weight added.
But do I dare to play with it tomorrow? A new racket may require more than 2 hours of getting used to. It's a complete competition player's racquet that can stretch your performance to absolute limit, but getting behind the shot and high RHS is still crucial, making defense the biggest question mark. Getting used to the flat shot also requires adjusting to the 16 mains. On the other hand, in my bag, the Gravity Pro is tempting, which is easier for pretty much everything, but the feel is more vague and I haven’t played with it for a while. The Blade is ruled out because I can't serve with it. It's pure hell to buy a new superlative racquet right before competitions.
 
PM me if you want to hit with the C10 Pro (assuming you're in the US). You can restring it with whatever you want. Right now it has slightly used Cyclone in it. My only ask is hit with it all you want but try not to scrape, etc. the ground with it. I offered to let @SupahMan5000 borrow the Regna but he said he has to scrape the ground so it was a no go.

Are you able to check SW and TW measurements to compare them against mine?
Not in the US so not quite worth the shipping around.
 
Not in the US so not quite worth the shipping around.
Yeah, International shipping is too expensive.

@Hulger I can switch to a new racquet pretty easily for most shots. Certain shots like the slice however require more familiarity with the frame to determine how much it's going to float or if I need to change my racquet angle ever so slightly, etc.
 
Just got Vcore 95 2021 version. It’s beast of a racquet with some weight added.
But do I dare to play with it tomorrow? A new racket may require more than 2 hours of getting used to. It's a complete competition player's racquet that can stretch your performance to absolute limit, but getting behind the shot and high RHS is still crucial, making defense the biggest question mark. Getting used to the flat shot also requires adjusting to the 16 mains. On the other hand, in my bag, the Gravity Pro is tempting, which is easier for pretty much everything, but the feel is more vague and I haven’t played with it for a while. The Blade is ruled out because I can't serve with it. It's pure hell to buy a new superlative racquet right before competitions.
The answer is very clear from the holic perspective - you should absolutely play with this new stick. It will be amazing.
 
Just logged 2 hours with the gravity pro. Loving the feel on this frame. I can tell exactly where the ball is going on contact and with the grommets settling in, the frame just feels better and better.

Easy shape on the ball too - provided you are loading the legs and bending the knees to get under the ball. Definitely not a frame that forgives, but it for sure rewards a lot more than a traditional players frame as long as all the fundamentals are being executed.

Tour version is in customs and should get here early next week.
 
Just logged 2 hours with the gravity pro. Loving the feel on this frame. I can tell exactly where the ball is going on contact and with the grommets settling in, the frame just feels better and better.

Easy shape on the ball too - provided you are loading the legs and bending the knees to get under the ball. Definitely not a frame that forgives, but it for sure rewards a lot more than a traditional players frame as long as all the fundamentals are being executed.

Tour version is in customs and should get here early next week.

glad you a found a true love.

you know I'm a huge fan of the GPA as well (gravity pro auxetic)

today, the TF40 18x20 305 slid into my 2nd set, and it behaved super well at net, maybe almost as good as the GPA.
more maneuverable version of the GPA!

currently only traveling with 18x20 sticks!

P97D, haven't tried it yet
TF40 305
GPA
 
glad you a found a true love.

you know I'm a huge fan of the GPA as well (gravity pro auxetic)

today, the TF40 18x20 305 slid into my 2nd set, and it behaved super well at net, maybe almost as good as the GPA.
more maneuverable version of the GPA!

currently only traveling with 18x20 sticks!

P97D, haven't tried it yet
TF40 305
GPA
T40 is sweet. I prefer the specs of the pro for my game. Little more static weight and more hl balance just makes my swing and serve effortless and loose.

I’m guessing you have hit with the v7 blade? Amazing frame if you like that type of t40 spec.

Gravity pro is a true gem. A prestige for the modern baseline player who wants a bit more forgiveness without sacrificing feel. Head really threaded the needle quite well with the gravitys.
 
T40 is sweet. I prefer the specs of the pro for my game. Little more static weight and more hl balance just makes my swing and serve effortless and loose.

I’m guessing you have hit with the v7 blade? Amazing frame if you like that type of t40 spec.

Gravity pro is a true gem. A prestige for the modern baseline player who wants a bit more forgiveness without sacrificing feel. Head really threaded the needle quite well with the gravitys.
My GPA collection are all around 340 and 32.5 with OG

My single tf40 305 18m is 331 and 33.05 but feels a lot more whippy. 9 grams is a lot.

I have not touched a BladeV7 in several years. Had a green one for a bit. Had a velvety finish IIRC.
 
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Dear fellow holics, I’ve become boring. I have three Diadem Elevate V3s. My injury holic purchases still exist but I’m trying to remain faithful to the elevate. I’m also playing tour bite / synthetic gut. I’ve become boring. Trying to find my game again through simplicity.

But on the bright side, I’m playing tennis, so I’ve got that going for me.
 
I did forget how rad poly/syn gut is. I grew up playing synthetic gut, so putting it in a frame feels like home and really makes me connect with tennis.
 
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Dear fellow holics, I’ve become boring. I have three Diadem Elevate V3s. My injury holic purchases still exist but I’m trying to remain faithful to the elevate. I’m also playing tour bite / synthetic gut. I’ve become boring. Trying to find my game again through simplicity.

But on the bright side, I’m playing tennis, so I’ve got that going for me.
Boring does not mean bad. I guess I’m boring now too. I still read everyone’s reviews here but don’t wanna try anything new right now. In the past I would’ve definitely tried the new Yonex’s, but this time around no interest whatsoever. Simplicity is good. Glad you’re back playing.
 
Boring does not mean bad. I guess I’m boring now too. I still read everyone’s reviews here but don’t wanna try anything new right now. In the past I would’ve definitely tried the new Yonex’s, but this time around no interest whatsoever. Simplicity is good. Glad you’re back playing.
Thanks. My holicing is paying dividends as my wife is thinking about playing with the Speed Pro and a buddy coming off Liquid Metal Radical MPs is loving the VC95. So I’m spreading my holicing like a virus.

I love the uniform flex of the Elevate V3 as well as the thinner beam and string bed. Took me a while to dial in the static/balance/SW, but this is an awesome racquet.
 
Dear fellow holics, I’ve become boring. I have three Diadem Elevate V3s. My injury holic purchases still exist but I’m trying to remain faithful to the elevate. I’m also playing tour bite / synthetic gut. I’ve become boring. Trying to find my game again through simplicity.

But on the bright side, I’m playing tennis, so I’ve got that going for me.
That's great. Elevate v3 is a fantastic modern frame! I had 3 at one time. Sold them off to members of my hitting group.

Now start messing with various string setups, differential tensions, and try wrapping your OG from the throat down and let us know which of those changes helps the most with your launch angle!
 
That's great. Elevate v3 is a fantastic modern frame! I had 3 at one time. Sold them off to members of my hitting group.

Now start messing with various string setups, differential tensions, and try wrapping your OG from the throat down and let us know which of those changes helps the most with your launch angle!
I’m way too deep into the string hole. I didn’t mention how I got to poly/syn gut and now the permutations I’m thinking about. Gotta scratch that itch somehow.
 
I played today as a short one hour prep with the 97VH (367g with leather). It feels more awesome with leather. I also brought the original FC and it was even more awesome, I think. But the string broke after 20 minutes.
I hope my match tomorrow will take longer than an hour and I can enjoy it a little bit. It is never easy against these high level calibres...
 
@bfroxen My TW adapter just came in this week. Super easy to use and very helpful In figuring out more specs. Unfortunately I also live in Texas so I get hit for the extra taxes But that does mean the package only takes 1-2 days to arrive.

In watching the video on how to recalibrate my machine this morning I saw you had a bunch of different types of calibration rods now. I have the original one where you have to put the piece on the end facing up properly. You had a hecagon end piece now as well as a new extendable rod. Was there a reason for these changes?
There's always a reason (and often a compromise). The hexagon eliminated the orientation requirement of the original, and it also had compliant "fingers" that made the fit on the pipe more consistent. The extendable rod was primarily to reduce the size of the packaging. It was a pain to fill the carton void, and it was expensive to ship overseas, as the "dimensional weight" was much higher than the actual weight. It's also a benefit to the user to have a more compact calibration rod. However, the extendable rod introduced a bit more variability compared to the pipe and weight, as there's some technique required to tighten it consistently in the fully-extended position.
 
Ah sorry mixed up on how the Briffidi works.
From what I read or was told on the subject the Y axis method is very error prone as well if not more.
Who knows really...
I'm hesitant to say I know anything, but I'm pretty confident in the twistweight measurements of my machine. I've characterized the linearity of the machine, and I've verified the measurement with a piece of pipe of known mass and geometry resting on top of the twistweight adapter.

I know it's difficult to trust my verification of my own machine, but I'd be happy to help anyone else that wants to independently verify. You can do so with a piece of PVC pipe, but you'll need to be able to cut it squarely and measure the length, diameters, and mass with good accuracy and precision. From those measurements, you can calculate the moment of inertia about the center of mass. Then, rest the pipe on top of the twistweight adapter (it fits nicely in the side supports) and take several measurements to find the center. The measurement will be at a minimum when it's centered.

One other thought on the spinweight minus swingweight method: there will be additional error when measuring a strung racquet, as the effect of air resistance will be much greater in the swingweight orientation than in the spinweight orientation. This is very evident with the solid face of pickleball (there's that bad word again) paddles, as the difference isn't even close to the actual twistweight.
 
Nothing like it being Nov 11 (hmm … armistice day / Veterans Day.. thanks guys), 81 degrees and 78% humidity. Air is so thick you can cut it. Heading to courts with my S(e)X Tours. At least no wind to hit through. This time of year I def feel like I’m on a different , and swampy, planet.
 
Oh it's not difficult at all to trust you @bfroxen it would perhaps be cool to have an easy verification/calibration piece, like the bar we have to make sure our swingweight measurments are OK, but no big deal really
 
First hit in 60 degrees or less this fall, plus wind. Didn't feel great hitting the ball, but played reasonably well.

Need to put some new string in the 7Gs, but not sure what. May put some 1.20mm Diadem ProX in one. Loved that string in the Angell.
 
Yeah I can play in the 40s here and it's fine, which is wild. In FL the 40's meant I was staying home. Humidity affects so much in terms of temperature impact.

Been having that thing with the Gravity Pro where I can't wait to hit with it again. I'd say it is a honeymoon but I used the old version for months. So it's more of a reunion of sorts. Very interest now in what the Tour version will bring to the table. Suspect Ill need to the weight close to the GP so I can have the same balance.
 
Did someone say something about simplicity? Percept 97 and Gravity MP demos arrived. Gave the Percept 97 about 20 minutes this morning and it was abundantly clear that the VC95 2023 is just better all around for my game. Are there some limitations? Yes. But those limitations are not present on serve or return and when I feel confident and execute those two beginning strokes well, the rest really doesn't matter as much now does it?
 
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I played today as a short one hour prep with the 97VH (367g with leather). It feels more awesome with leather. I also brought the original FC and it was even more awesome, I think. But the string broke after 20 minutes.
I hope my match tomorrow will take longer than an hour and I can enjoy it a little bit. It is never easy against these high level calibres...
Yay for the FC! (Although I know that yours might be a different model, aka PT57A and not 293.1 like mine). Better string next time and gl in your match!
 
Yeah I can play in the 40s here and it's fine, which is wild. In FL the 40's meant I was staying home. Humidity affects so much in terms of temperature impact.

Been having that thing with the Gravity Pro where I can't wait to hit with it again. I'd say it is a honeymoon but I used the old version for months. So it's more of a reunion of sorts. Very interest now in what the Tour version will bring to the table. Suspect Ill need to the weight close to the GP so I can have the same balance.
Yeah if the sun is out and no wind, the temperature doesn’t matter on the front range. Here I’m freezing at 61 degrees.

I’m having a lot of zoning with these old SX’s like you are with the GPs. Given that I have liked them for 7 months but only recently gave them main duty, I don’t think it’s a honeymoon either.

I can go 60% and spin and then just dial it up when I want to. Today I felt so heavy, legs were dead, but played really well and loose. Funny how that works, but this frame just rewards relaxed play. I didn’t even take other frames to the court, just 2 of these. Love the specs I have them adjusted to also.
 
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Yeah if the sun is out and no wind, the temperature doesn’t matter on the front range. Here I’m freezing at 61 degrees.

I’m having a lot of zoning with these old SX’s like you are with the GPs. Given that I have liked them for 7 months but only recently gave them main duty, I don’t think it’s a honeymoon either.

I can go 60% and spin and then just dial it up when I want to. Today I felt so heavy, legs were dead, but played really well and loose. Funny how that works, but this frame just rewards relaxed play. I didn’t even take other frames to the court, just 2 of these. Love the specs I have them adjusted to also.

Yeah the SX was loved out here. Multiple players used them but they have switched to Babolats oddly enough. The SX is kind of like the Extreme Pro. Power frame that puts a lot of weight on the ball.
 
Gorgeous morning in Los Angeles. Played from 10:30-noon and by the time we ended it was 81 and sunny. Was off my demo train and back on the Blade (with Rad MP as backup in the bag, never took it out) and without the struggle of trying to learn a new racket I just played my game and had the most fun I’ve had in weeks. Hit one inside out forehand that lasered so fast into the corner I wish I’d been filming it so I can see what I did and try to repeat the mechanics.

Yeah the SX was loved out here. Multiple players used them but they have switched to Babolats oddly enough. The SX is kind of like the Extreme Pro. Power frame that puts a lot of weight on the ball.

We had a Dunlop rep at our park last month handing out demos left and right (and selling sticks fairly cheap, like in the $150 range) so I tried out a SX300 Tour and didn’t like it at all. Everyone else who grabbed a demo put it down pretty soon too and we all went back to our main sticks. Not sure why but it just didn’t click.
 
Anyone ever heard of an SPI Competition brand? It’s got that Kneissl/Estusa frame shape. Says it’s graphite on the hoop. Blue frame with yellow pinstripes
 
Gorgeous morning in Los Angeles. Played from 10:30-noon and by the time we ended it was 81 and sunny. Was off my demo train and back on the Blade (with Rad MP as backup in the bag, never took it out) and without the struggle of trying to learn a new racket I just played my game and had the most fun I’ve had in weeks. Hit one inside out forehand that lasered so fast into the corner I wish I’d been filming it so I can see what I did and try to repeat the mechanics.



We had a Dunlop rep at our park last month handing out demos left and right (and selling sticks fairly cheap, like in the $150 range) so I tried out a SX300 Tour and didn’t like it at all. Everyone else who grabbed a demo put it down pretty soon too and we all went back to our main sticks. Not sure why but it just didn’t click.
The newer yellow one? The guys here are talking about the prior version which is a lot different.
 
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