Just stick in 13:1 gears, shim them obviously, a 40k (heresy edition) magnesium hydroxide motor, cut off a few teeth on the piston obviously then set AOE with a sorbo, stick a 180 degree purple bucking but cut off the nub and apply a Y hop patch then finish it off with a 5.99 tight barrel. PTFE tape everything to keep it together.
Go outside then burn it all and buy something else and leave it the fuck alone.
Sorry to hear your still having issues been a long few months trying to get that one sorted.