The pen mount is this one: http://www.thingiverse.com/thing:1612207
I figured the bolting down would make a big difference. Frankly that I’ve powered it up at all is an exercise in impatience. I just figured I’d share the image and ask, just in case it was the sort of thing you’d look at and go, “Oh, no, wobbling like that is because you you forgot to [insert random adjustment that I would have spent two weeks trying to figure out.]
Once the new table is built and this thing is in its permanent home, we’ll see how it behaves. Thanks again!