Quote Originally Posted by Jon Budd View Post
Yeah, I like my 23mm - much more cost effective conversion as the existing piston and rod can be used, with just a turned down HW seal on a new nose (same rod as a mk3, saving more costs - when you add the nose (+5mm) and HW seal (+6mm), you shave 11mm off the 98mm stroke, so 87mm - great at 23mm bore. Mine's been running for 2 years now without issues - but then I don't shoot that much

I also like the fact that your 22mm is full boddied / has a piston bearing.

I too use the titan #11
My 23mm was something I tried a few years back now I fabricated the piston from some galvanised pipe, it started of at 79mm stroke with a titan no 9, heavy to cock but blisteringly fast , I now have it at 85mm stroke 180 grams , and a mark 3 spring, it cocks nicely, and is a much softer cycle , need to see if its up to snuff as an FT weapon, oh and its an o ring of course, Having tried two 22mm skirtless tunes I believe the full skirt with minimal rear bearing has less friction due to the better support , and they shoot much nicer in my opinion.