Well I finally got my hands on the grinder this weekend and accidentally spent half of the day cleaning it up. I started snapping photos after a few minutes so thought I'd update this thread with them.
Yep, definitely a Major

Beginning the cleanup process. This is going to be messier than I had anticipated

The patient on the operating table. Thank god for air compressors!

The previous owner had shipped me 1/4 pound of ground espresso between the upper burr carrier and the burr!

Cleaned up


Temporary dosing solution

Next to the old grinder. Now I have no excuse for crappy espresso.

The old burrs actually looked to be perfectly fine to my untrained eye

I did not take photo of my slight rewiring. I shorted the upper and lower switches so that the knob (if I had one. It broke in transit

) is simply on/off. I also gutted the doser (there is no way to completely take the bottom off, right?) and put it back on, with the soda bottle inside it. Fits quite well!
I've been playing with the grinder a bit but am not quite about dialing it in considering the La Pavoni is only a few weeks old as well. Any tips on a starting position, from zero (burrs touching)?