So, here's the breakdown:
First (especially since you're trying to compare prices) you need to realize that you aren't simply comparing
2 machines, you're really comparing
5 machines.
The 6004 comes in 2 flavors -
both of which have the self-centering feature (SC). You can choose either the 6004 SC 6pt., or the 6004 SC 2pt.
Basically, you're simply choosing whether you want the 6pt. mounting or 2pt. mounting (both of these systems are
fast and efficient).
Oddly enough, both are the same retail price ($1700)
FWIW, I happen to own the 6004 SC 2pt.
The 5003 comes in 3 flavors.
One of those variants (the so-called "6pt. Quick Mount" version) does
not have the self-centering feature.
To move the two towers apart (or closer) you need to use a hex wrench to loosen/tighten each tower. It's just a bit more fiddly and occasionally may take a bit more time to dial in a specific adjustment. The "Quick Mount" name is somewhat misleading, in that it is actually the slowest & most fiddly.
In other words, it's the same mounting system that you see on some of Gamma's other models (i.e. Gamma X-ST, Progression ST, X-6FC, Progression 602FC).
Now, the remaining 2 variants each
do have the self-centering feature (SC).
You can choose the 5003 SC 6pt., or the 5003 SC 2pt.
The 5003 SC 2pt. also has far fewer adjustments/knobs to deal with (i.e. easier/faster mounting & unmounting).
The three 5003 variants are at 3 different retail price points.
$1200 6pt. "Quick Mount"
$1300 6pt. SC
$1400 2pt. SC
BTW, it doesn't make a lot of sense to me why you have to pay $100 more for the 5003 SC
2pt. than the 5003 SC
6pt.
After all, if one chooses the 6004 SC 2pt., it costs the same price as the 6004 SC 6pt.
What makes the 6004 notably different (and
much nicer to use) than the any of the 5003 variants is the
base clamps.
All 3 of the the 5003 variants (regardless of which) come with the exact same base clamps that many other Gamma machines come with (the so-called "Quick Action Base Clamps"). These are the same base clamps that you find on the X-ST, Progression ST, X-6FC, Progression 602FC models.
The 6004 (either one) comes with the much nicer/easier base clamps (the so-called "Switch Action Cam Lock Base Clamps").
So, when you previously mentioned the $500 difference, you really weren't comparing "apples to apples". $500 reflects the difference between the lowest tier 5003 versus either 6004 option.
So, it may be more accurate/prudent to compare the prices of the self-centering equivalents.
5003 SC 6pt. versus 6004 SC 6pt. = $400 difference
5003 SC 2pt. versus 6004 SC 2pt. = $300 difference
If you're stringing for other people, in addition to yourself, that extra $300/$400 will pay for itself after just 20/27 string jobs (presuming a $15 fee).
Nonetheless, the $300/$400 difference is well worth it, IMO, for the ease/enjoyment that those base clamps provide.
Hey
@struggle, can I get an Amen on that?