I didn't have much time tonight, but attempting to adhere to the adage "do SOMETHING every day", I went out and worked on the next item in the instructions, the rear spars. I got both spar webs and the center and end reinforcement plate edges deburred. I had thought of using a 2" schotchbrite wheel on the spar webs, but then thought to just turn the bench grinder sideways on the bench. It worked like a charm.