Pilot drilled rear spar assemblies. A couple of the holes on the doublers for the aileron pushrod holes are a little too close to the edge of the doublers, but I think it will be fine the way it is. The doubler is made out of thick material, and the edge distance is still at leat one rivet diameter, so there should not be any danger of tear-out failure. I will need some sort of drill bit extender in order to drill the pilot holes through the root rib attach plates.
