ok well i bought my gun about a month ago and just got all my parts, i got a 300% ftk magnum medium motor and i switched out the spring to a 200%, put all the gears in and everything, and spent over 20 hours trying to fix the box that activates firing. and i improved it to a system that worked better. i have spent over 100 hours trying to fix this gun, now i just did everything and i had the motor out of the handle and it all worked flawlessly. then i put it in and the motor plate on, pull the trigger and nothing happens, eventually the battary and wires start to get hot so i unplug it, i now have no idea what this could be, and the motor dosnt even make a noise. Also i bought a heat resistant selector switch and it dosnt seem to be working,to make the connection complete it has to be pulled back farther then what the fire selector can do, anyone else had these problems or am i alone?