Finally finished drilling all of the rest of the HS skins - nothing hard, just a lot of moving clecos around and making sure that I didn't lose my spot. FWIW, I chose to do all the horizontal members top down, then all of the nose-spars, then each of the vertical spars from side to side.
Next up - Drilling out the rear spar #30 holes, as well as the spar web. Then a bunch of disassembly, labeling, and deburring.