Glad you got it off of there before any issues! Sometimes, the symptoms start before the damage can be seen (at least with a naked eye).
Yes I would have not been happy if my DTD was damaged but glad I prevented that... thanks to the wonderful folks at NLG.
The WEIRD thing, though, is that my other s2000 was working fine. The symptoms (reel tilts and Door M errors) ONLY showed up when I did the game swap from my "machine to flip" to the one I'm keeping. When I tried to set it up, after I cleared it, the problems began. I don't think I needed to do a clear, but I wanted the practice! I wonder if I hadn't cleared it and just stuck the chips in, if it would have not had the errors?
I really need to not over-think all this... at least it's working now.