I have had the cannon on my AC DC for a couple of years. It is really light weight and doesn't do any harm to the mechanism. There is a heavy duty motor that rotates the cannon nicely. I haven't had any complications or abnormalities since I installed it back in the day. Personally ,I think it is a great upgrade to that ugly mech that shoots the ball. I mean really , it is a cannon, it should look like one. That hand painted cannon , in addition to the leds in the wick area and the front of the cannon reacts with the movement and really enhances the look in the game.