Quoted from stefanmader:t's incredible what problems appear when working on a pinball machine. I've screwd the left flipper as tight as possible, but the flippershaft still manages to turn with all the forces... i think i will roughen the shaft up a little, hopefully that works. I already broke a screw from tightening
I don’t know if this helps, but your problem reminded me of this Jersey Jack video on flippers I watched a while back (go to 11:41 in the video). He says that the shaft should never be tightened all the way.
Love the project, man!
