I continued to work on the wing skeleton as I wait for the weekend to finish my right fuel tank. I deburred and dimpled and countersunk the inboard left wing top skin understructure and was able to do the same on the bottom. Good progress. Next will be to move to the right wing skeleton and start prepping it. I need to prime the countersinks, but I'll do both wings at once for that operation. This stuff isn't too exciting to read about. I have a few more hours of this and I can start riveting again.
