what are some tips to make a G&G L96 more consistent FPS wise? I already have it on HPA, as well as a King Arms chamber to use a VSR bucking. is there more mods/tuning i can do on the airseal? is it possible to do any tuning for the air seal I can do on the mags like shim the gas lips you can do for GBB's? I already have the G&G rubber kit on the mag/bolt.