Do I have my bases covered?

Alright, I got a G&G FS51. (Folding Stock Version) I have upgraded my internals quite a bit. I just want to hear opinions and suggestions. So far I have Dropped in a systema reinforced V2 Gearbox shell and have put a radius in the corners to prevent the gearbox from fracturing. a systema bore-up cylinder kit with a New designed rubber piston head that contures into the cylinder head :D! a M-120 spring and G&G Helical Hyper Torque Gears and a DeepFire Titanium half-tooth piston. and My gun came stock with a tight-bore barrel like all G&G's do. I got a good li-poly Battery. 11.1V 1900Mah. and my gun is shimmed properly with Metal Bushings on the gears and im sure im all set but i just want to hear what the airsoft community has to say.