EDIT: The pics have been cut from the right...Incorrect Sizing??
This IS a write-up, so it technically shouldn't be placed in the new-mods thread...
I did a:
Barrel Exchange (crayola, secured with plumber's goop)
Mad Rage of furry.
The TTG. Open it.
It opened. Most of the mods are in already.
The barrel, Crayola, smoothed with a wide drill bit, secured with plumber's goop, front smoothed with bench grinder.
The spring. From a toilet paper shtick. (No perverted jokes)
On the plunger.
Oh, and a better plunger seal, too!
The best part: A silenced, beefed, pubed up TTG: That Shoots! Oh Joy!
Ranges Before: 25-30 ft.
Now: 50 ft.
Estimate future ranges, with PVC, better spring, and removal of dead space: