Decided to go crazy with a lathe yesterday and was able to get some huge fps gains. (25-30fps over pooty stage 6 so about 50-60fps-ish over stock 2.0) I was able to move the 2nd bolt guide o'ring further back. Maybe someone from dlx can weigh in on why the oring wasn't put there in the first place?? Pooty uses that area for a spring, stock uses it for nothing as far as i can tell,, but there is just huge potential for volume gains for the firing chamber.
I also bored out the back, but that's nothing new.
Wish I had a luxe reg tester to get some actual numbers on the pressure but those are $$
====For your viewing pleasure====
original for reference (image from pootypaintball.com)
I did a lot of testing and this is my experience. Was able to put green orings all through my pooty ndz can and it had some good fps gains and eliminated temperamental puffing. What I've noticed is the fps and pressure I can get about the same with the my modded stock and the pooty (and gommie parts too). However, the pooty bolt IS noticeably quieter/deeper/breathier sounding -with or without the pooty can or bolt guide. In other words, I attribute the satisfying sound change entirely to the tip of the bolt (flat face). I don't know why, maybe some Venturi effects or turbulence? Anyway, If i were to do it all over again, I would get just the pooty bolt/bolt guide over the full stage 6. The NDZ can looks great but its just not as reliable as the stock can tolerances. My modification was great fun and got similar fps at the same low pressure with stock as the $200 alternative, but! After playing, the stock modded pressures didn't translate to the shot sound quality that I was hoping -sounded as good as stock can sound to me.
Next time I play I will be using the pooty bolt/bolt guide with one of the stock modded cans. This is the best combo I've found so far. As long as it doesn't struggle with a full day of play or become unreliable, I'll be keeping it. If not i can always fall back on my rock solid modded stock guide.
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Thanks for looking guys