rob3dr:
LOP...Length of Pull? I've got longish arms, so the on/off valve used increases the length past what most people find comforatable. Without that on/off, the adpator is made so that a 9oz., 12oz, 16oz, or 20oz. tank ends up the same length as the normal PCP tank (those weight tanks of co2 all have the same length, they just get fatter). The valve use in the co2 adaptor is a condor valve...need the big opoenings to move enough of the "thicker" co2. IS NOT efficient in the 12" Talon SS...really needs a longer barrel to get the good of the amount of gas that valve can pass. I've a second c02 adaptor that's due to get modded....not for more power, but for LESS. Hope to get the same max. as I have now when the pre-load is adjusted up, but100fps LESS when adjusted down.
Buttpad is a 9oz. CO2 tank pad, I've had it around from paintball, just cut off the top "prong". Quick look shoes that they still make tank butt pads, they're just harder to find now that many paintballers are going HPA.
Sdale:
Already have a trade in the wings...guy with a micro-valve and a need for speed wants the standard tank, which works out fine as I've a need for quiet.