I believe the thread was actually derailed from the start. Robin merely provided the name for those not in the know.
Having a 3d printer, I can confirm it is easy to adjust the size of the output. All you need to know is what you want the inner diameter to be and the rest is simply a matter of scaling the stl file prior to output.
sigh... I guess this makes me an enabler...
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Permanent collection (no plans to trade or sell): DRV, mech Ion
Current playable markers (These all get played with but I'd be willing to trade or sell for the right offer): Springfed Automag, Empire Resurrection, Bob Long Vice, Ego 7, Inception Sniper, TiPX, X7 Phenom, SP-1, 3357
Traded or sold: DM10, Orracle, Black Magic, PGP, Empire Sniper, Kaos Pump, Diablo, PMR 7, 2012 Rail
Wish List: Gargoyle, Karni, Phantom, Ego 3.5, Shocker SFT, Duck, Karta Mag, Reptile VIS, Luxe, Nasty Typhoon, CCM MBP... the list just goes on and on...