I rebuilt my Whirlwind flippers, which were operating normally before except that they needed the rebuild. Left flipper coil had to be replaced, I probably reversed the 50V power wires at one point to that flipper. Once corrected; flipper is extremely weak, as are both of the R flippers. I measure 38.3 Volts across the coil with power on, instead of 50 V. Is that the problem? Would that mean the aux power driver unit board is defective, and possibly damaged by the reversal? Best bet to send it to TwoBits for repair? Thanks.