This gun had zero issues when it was stock. Had it upgraded by a recommended fun tech and have been plagued with issues. Gears stripped after a couple thousand shots, had them replaced. Chunk of the broken gear was left behind and found its way into the gears. Had that mess cleaned up. Now I put about 3000 rounds through it and it just whines like in the video. Motor height is not an issue. Opened the gearbox and all the gears are fine, piston looks fine. No metal pieces or anything. Pulled the motor and ran it off the battery and it had tons of torque.
I am at a lose and quite honestly fed up with what appears to have become a lemon of an "upgraded" gun.
http://m.youtube.com/watch?feature=e...v=cBkVz_KbIQE#