I'm so very frustrated right now. I also feel stupid. I've been messing around with this thing for about three weeks, waiting for parts, trying to diagnose what's wrong, asking for help and it seems that all along the problem and solution were simple as well as right in front of me.
While working on the flippers last night, I noticed something I hadn't before. The switch stack for the right lower flipper moved ever so slightly while I was filing the pads on the EOS. I grabbed the stack and pushed on it and wouldn't you know it, it moved. The damn thing had come loose ever so slightly from it's original position, shifted, and then stayed in that position. Wow, just wow. All this work, waiting, yelling, loss of patience and for what? A loose bracket. If I was able to see that before, I could've put it back, tightened it and be done. But now with all the tinkering, it's still not right. It's playable, but still not 100%.
While I appreciate all the help I get from Pinside and my fellow Pinsiders, it's just sooo frustrating not having another pair of eyes to look at the problem I experience with my machines. If I had hair, I'd have pulled it out already! Auuugh!
Anyway, I'm going to leave this as unresolved for a few days just to make sure a few more hours of playing and "adjustments" won't fix the issue.
Thanks for the help!