Ok, play-tested the new grommits a bit today, and look what happened!
This is the best I've ever done in Robotron! Having new grommits really make a difference with the feel of the game. Oh man, this could get crazy -- I rolled over the waves a few times, till it reset the difficulty back to wave 1. I burned through about 20 lives when I gave up at the end, because it was just going on too long!
I'm lovin' this cabinet!!
Gotta stop myself from playing too much and not progressing on the rest of the restore.