Priming And Starting Stab Assembly

Finished countersinking the 2 stringers. Then I scuffed and cleaned all the nose and interspar ribs with a Scotchbrite pad, mineral spirits and isopropyl alcohol before priming them. Then began riveting the initial internal structure IAW the plans. Most rivets were set using my squeezer and flange yoke. The 4 end rivets on each stringer were too tight to use the squeezer but I was able to buck them uneventfully using my 1/8" offset cup rivet set in the gun at 70 psi.