The problem is intermittent and has occurred from day one. If you try to shoot the bell from the cannon while sweeping left to right, about 25-50% of the time it will not fire the ball and instead burns a VIP pass! If you wait until the cannon goes all the way over and is sweeping from left to right, a shot to the bell works 100% of the time. We have tested the switch where the ball rests inside the cannon, as well as the in menu cannon test which tests the two switches that read the position of the cannon. It also seems to have nothing to do with the lockdown button switch, which also tests fine and pressing it harder has no affect. Has anyone seen this issue?

We did call Stern but at the time failed to get through.

No, the cannon test doesn't show the state of the ball switch. I wish it did. We tried tweaking the ball switch arm but no luck so far. Good idea on the wiring binding when moving. I will ck that next time I'm down there. It's on location.