Hey P2skater,
Because, as HPA users, we can adjust our output PSI, which means you do not need to use your adjustments on the striker spring. You should screw the striker adjustment all the way in to make the spring hit as hard as it can. Loctite it if you want, put it on the threads of where the spring is.
As for hop up, I found that either R-hop and M-nub (difficult-ish) or the flat-hop and standard nub (easier)
Because, as HPA users, we can adjust our output PSI, which means you do not need to use your adjustments on the striker spring. You should screw the striker adjustment all the way in to make the spring hit as hard as it can. Loctite it if you want, put it on the threads of where the spring is.
As for hop up, I found that either R-hop and M-nub (difficult-ish) or the flat-hop and standard nub (easier)