Just more drilling of the main spar - a LOT of holes.
Finished drilling the initial pass of drilling every other #40 hole. Then went back over and drilled the holes in between the clecos.
I then up-drilled those holes to #30. Cleco'd with bronze clecos, removed all #40 (silver) cleco's, and started drilling the remaining #40 holes up to #30. Battery and time ran out.