Hi Rob,
I haven't done the trick with the Q relay but heard that you can stick a piece of mylar to the unside of the metal flap to stop it from sticking to the coil. This is really a workaround so it is probably best to just change the coil. It sounds like it is no longer sticking but you could also check the switch contacts while it is energized to ensure it is working properly. We could also not fully tighten the stack without causing a problem (which is also a fault) so this may have worked loose.
You would have to check with Nino on his game but I thought that the ball stepper should start with the arm not touching any of the contacts. The first contact is for the 1st ball and the last contact is the game over so I think it should not be touching at all when the game is first started.
regards Derek
