I am trying to get my gun to shoot as close to 400 fps while shooting over 25 rps. Currently my gun shoots 28 rps while my fps is a horrific 214. I obviously have compression issues, but I would like to replace the faulty parts rather than to patch them up. What is currently in my gun is; 13:1 shs gears, brass bearings, shs air nozzle, an element ultra high torque motor, shs hop up, shs 14 metal tooth polycarbonate piston, and an 11.1v 3000 mah lipo battery. Money is not an issue and I would appreciate any advice given. Thanks!