QB78 conversion attempt

[Ribbonstone]

Evidently there is enough to blow out the weaker materials.

[Mr. Panther]

     Well mine isn't so modified as that one, and the Crosman TP gasket works just fine for me. Sure beats having to cut and size up tubing, for the moderate modifications on mine. I am liking it quite a bit with the mild mods I did to it. It makes it just what I want. Warm enough for CO2 now where I live and it is one holer all day if I do my job, so any pest I get in my sights for 20-35 yards should be in for a headache LOL.   

[Ribbonstone]

No need to do anything more.....pretty much everything else is either a power-mod or an efficiency mod.  If the power level is to your taste, it's not leaking, and it shoots well....leave it alone.