Ok so just finished a restoration on a JD and I have some multiball issues. I have replaced both opto boards with GLM boards, also switch test works fine and there is no divots in the ball trough. So here is what is happening on a multiball and will end the game with balls still in play like they have all got drained also if the ball comes down through the center it will cause 2 balls to stack up under the kicker thus firing 2 balls. Any ideas guys ?