Completed cutting the wing slots and was pleased with how it turned out. I started by removing the blue film from around the slot and marking the correct side to remove. Then I taped it up to limit scratches and make it easier to distinguish the line. Then I supported the side skins with 2x4 underneath. I used the cut-off wheel on the dremmel to cut real close to the line and just took it slow, working my way along the line. I place the 2X4 directly under my cut so it wouldn't try to grab as I cut through and just cut into the wood as well. I ended up with a fairly smooth cut near the line which I finished up with a file and used an old scotch bright wheel to hand work the edges smooth. Very happy with the results...hopefully the wing spar will slide in nicely.
Marked the correct side to remove for the wing slot
taped it off to minimize teh scratches
Removed the sectiona and used a file to get the final shape to the line
