Noticed the left flipper on my newly acquired Comet machine returns slower than the right. It's also worth mentioning that once in a while it sticks in the up position, but oddly seems to return when one of the other solenoids fires (pop bumper, other flipper, etc). Figured this might be a clue in what's causing it stick. I'm trying to determine if it's a bum flipper solenoid, solenoid spring, flipper button switch, end of stroke flipper switch, etc? Anyone got ideas on debugging it to find out which one of these things it might be?