hello, I am new here and I have been researching for quite some time now, and have recently seen the king arms m150 gearbox on ehobbyasia.com(heres the link- http://shop.ehobbyasia.com/king-arms-m150-ver-ii-rear-wiring-complete-gearbox-for-m16a2-aeg.html ) So my plans would be to just "drop in" this gearbox after modifying it to be semi-auto only. Has any one ever had experience with this gearbox before, or even for that matter, dropped in an m150 before and had success?