With my new-found motivation and a clear head, I went back to work on the right aileron. Today I finished up all the riveting, both the pop rivets on the spar and the solid rivets on the ribs. I torqued on the brackets and mounted the aileron on the wing. Looks great!
As with the left aileron, I used the hollow-core door and some MDF to weight the aileron down as I riveted. The aileron had no measurable twist, so I must have done something right. The parts for the new left aileron have arrived, and I’ll start in on that after I make some progress on the flaps.