I've worked on quite a few Mills slots.
Hey Ken. Where's the best place to get springs? I only need one. There's a BONUS Hi-Top on my desk at work that had a stretched spring on the lever that causes the BONUS payout once all the letters are gotten. I have everything working perfectly, except for that BONUS payout. If I keep the spring loose enough, the BONUS part works, but won't pay out. If I tighten it enough to apply the pressure needed to move the payout slide levers, then it doesn't move out of the way enough for the BONUS letters to pop up. I figure I can get the right spring, but don't know if I'll need to buy an entire spring kit just for that one spring. Plus, I don't know who sells them. I've sent a few emails based on some internet searching, but didn't get any responses...