Picked up a CFTBL a few weeks ago and have had to replace some burnt connectors, switches, both flipper opto boards, and everything is working except when in multiball as soon as you find the creature and the lamp comes on the flippers start twitching which makes it really hard to make the snackbar shot. when I disconnect the lamp no twitching. Must be a problem in the unregulated 12 volt, maybe a cold solder in the bridge rectifier or cap, any help would be appreciated.