I have been super busying doing the right wing and not posting, so here is a big dump. Lots of time was spent figuring things out and going down rabbit holes, the left wing will be a lot quicker and I will do a detailed daily step by step. Lots of time spent on the leading edge light and the conduit for the wiring.
Several BH builders expressed concern about the leading edge light as far as compromising the integrity of the D-spar. I used a backing plate (with the anchor nuts, .020 lens, and a .025 lens cap, so there are 4 layers including the wing skin. This bay, 2nd to last, is significantly stiffer than any other bay in the entire wing.
Wingtip attach/drilling locations have been marked, but can't do that until after the skin is riveted.