You don't need too much soldering, maybe the trigger and buttons, but that's it, if you're planning on using recoil, that can be a little more complicated, but Aimtrack site has instructions. Anyway, as other user told you, you're WAY BETTER off trying GUN4IR since it has line of sight accuracy, Aimtrack does not, aimtrack is just another wiimote-like solution that can't do line of sight aiming.