I drilled the holes in the doubler plates for the rear spar and traced the hole for the controls. I also deburred everything and primed it. For the control hole, I marked the center, drilled a started hole then use the step drill to cut most of it away. I then followed up with the sanding drum on the Dremel. The final step was to cleco it back to the spar and clean it up until both matched. I also primed the aileron bracket hardware, so it’s now ready to rivet.
