Wow -- a really productive day. I countersunk the last four stringers on the leading edge, then mated with EP-420 and riveted with RV-4412 Avex Countersunk rivets. I cleaned up the excess EP-420 with MEK.
When complete, I scuffed and then mated the four upper wing stringers to the upper tank skin with proseal. It is 100% cleco'd and tomorrow, I'll rivet with proseal dipped tank rivets, RV-6403.
