Today, I spent some time (off and on) working to finish match-drilling the left aft wing ribs, and prepare the right wing to be done next. There are a lot of ribs and it's important to make sure the spar is properly secured to the bench to keep it from twisting or bowing while match-drilling. I used C-clamps to keep everything in place, similar to the way I secured the spars during countersinking operations.
