Today I had a few hours in the garage, and was able to get through a number of steps. I started by countersinking the trailing edge wedges, then countersinking the left rear spar, then dimpled a bunch of parts.
I used the Cleveland Tools wedge drilling jig, which made this a painless operation.
On the last hole of the right elevator wedge, I applied too much pressure and slightly elongated the hole. I’m going to leave it and build on, since all the other holes are good.
Countersinking the rear spar for the trim tab hinge was also quite easy. I clamped down the spar and went slowly. Because the spar is sandwiched between the skin and the hinge, countersinking the thin material is acceptable. The holes become slightly elongated, and there is a knife edge, but that is by design in this case. I deburred the holes carefully, trying to round the knife edge just slightly.
Then it was a few hours of dimpling; spars, ribs, shear clips, plates… basically every part that needs a dimple is now dimpled. A couple of holes were hard to reach, and I ended up using my vice grip dimpling tool, including the forward flange of this rib.
Next step is to rivet some nut plates to the inspection plate doubler.