Okay so I've been working on a Flash Gordon machine, one of the main problems I have with the machine is the flippers. Here's what I've done so far.

-Disassembled all of the flippers clean all mechanical parts
-Replaced all coil sleeves
-Re-soldered all connections on coils and switches pertaining to the flippers
-Replaced all fuses
-Checked all switches for proper positioning
-Checked the coils with a voltmeter all are around 3.4 ohms which from my limited knowledge they are good

After all that the flippers aren't working properly, the left one with stick occasionally and the right lower one is sporadic and will fire like at half the actual strength that it should, also the upper right flipper matches the lower in the sporadic strength. The upper right flipper also won't hold when holding down the flipper button.

Any advise would be greatly appreciated