Brief Description: Mid-Aft Body Join - Drill for Step
Per the plan the only two things you do after initially putting on the side skins is dry fit the step and drill the arm rest.
So I drilled the hole in the skin for the step and made sure it fit without any interferences. The shaving of the flanges I had done previously was fine. No further adjustments were needed.
PS, I think it was good that I drilled this BEFORE bending the tab. Because bending the tab would have caused the hole to be non-planar and the drill would have had trouble with that.