I'm upgrading a stern spiderman, and I ordered three flipper rebuilds from pinball life, 1 left 2 right. When changing the first one, the tightening bolt broke right off after it got a few threads in. So I needle nosed it out, robbed a bolt from the next one, put that in same thing... So robbed a bolt from the last kit changed the tool I was using which was a ratchet with the allen attachment to a allen wrench. Put that in.. guess what. Few threads in.. it broke. So I had to switch to the bolts in the original. Guess what.. didn't break. No issue with the stern bolts. I've always heard good things about pinball life's rebuilds and I've used them before with no issue, is it possible that the tightening bolts were just a bad batch?