Goal for my g&p m4 with a 300mm inner: 1.5j/30rps I have a zci 22tpa ht motor, and 16:1 gears with a sp120. I already have overspin. How would i cure this? If i shave the tooth on thr gear, will i have to shave the tooth on the piston? My gun fires 415fps right now. Thank you guys.