I started the 7A project this past week-end and got as far as drilling out/enlarging the pre-punched holes on the rear spar and reinforcement bar. So far I have no problems but a couple of questions. When the reinforcing bar lays in the spar channel, is it perfectly flat. Also when cleaning up the reinforcing bar, I found it was just as easy to use scotch brite rather than the wheel. Thanks for everyone's help. I love the forrum.