On the stock PM7 board it's called the eye sensitivity setting. Raise it up a couple milliseconds. That should help. I used to set my guns up by putting 10 balls in the hopper and then ripping them out. If I broke one, I'd up my eye sensitivity another millisecond. Then repeat until I could fire all the paint out. This can help you prevent ball breaks during those intense games when your hopper runs low as well.
Etek 3LT grey/black f/s
Valken Proton greyish/black f/s
68 4500 PE stubby, LP output f/s
68 4500 AIR tank(no reg) f/s
Creed Battery, eyes and noid f/s