I don't think a larger frame would change much to be honest...the fact he played great tennis this week is testament to his hard work on and off the court. Racket head size, especially the minute change from 95 to 97 or 98, is not going to make him a slam winner....it's personal preference.
I heard before that Fed gets lighter frames from Wilson than 340g and adds silicone and lead to get his desired specs. If this is true, without the actual weight of the rackets he gets from Wilson, it is impossible to know how much silicone is in the handle, no? The only people with that kind of...
That is not the case. I've been tuning my own rackets for years. I've always used lead and silicone no matter what racket I order. And imo, leather is the only way to go. If you haven't tried leather, you should. There is a reason 90% or so of the pros use leather!
Ask yonex Japan why they are so anal about changing grips... Pros all wrap their own or have p1 contracts. No one is using a racket directly from the Yonex Pro room. I requested leather and they said they didn't do it. I'm just a nobody getting a discounted frame through the right channels... If...
The SV feels more solid and stiffer, which I like more. The vcore does seem to be more powerful. My opponent commented on how much heavier my strokes were when I used the vcore. I am going to fiddle around with the Swingweight a little and test it some more.
The yonex leather is good IMO too.
There's no hg written on this frame, but there's no lead evident anywhere. It seems to be custom. The handle is foam/polystyrene type filled as usual with yonex frames