It appears either my old glass plate was warped, or in the process of removing it and installing the mirror I fixed this issue, because a larger print is going right now and the bed ramming seems to be resolved.
FYI, I have not yet gotten around to this, as I need to travel for work, but I hope to get it done when I return next weekend. I'm still scared of frying a rather expensive board, so if anyone else has experience doing this, I'm happy to hear any tips you have.