The in-laws were in town today, but I kept sneaking out to the garage to work on the plane project here and there. Got all the horizontal stabilizer parts deburred, and drilled the trim wiring hole in the left front spar. I wonder why they have you drill this hole right next to a perfectly workable tooling hole – it could just be enlarged and put to use if they'd put it in the right location.
Update: This was a stupid mistake! See here for details.