My tungsten bucking bar from Dean Webster at www.buckingbar.net arrived today. Its small but very heavy. No excuse then, out to the shed to sort out that left flap. Well, I think it took longer to squeeze the rivets on the outboard rib than it did to buck the bottom surface rivets! I had to use a couple of CSK4-4 rivets right at the back of the inboard rib. That's annoying because I hadn't dimpled for a CSK rivet and there was no way for me to dimple after the fact. I did my best to squeeze a 1/8" dimple die in there but it wasn't really a happening thing. Shame, because now those two aft-most rivets sit a little proud of the skin :-( Lesson learned for the right flap.I still have the top surface rivets to do, and in the picture you can see the flap clamped to the workbench to keep it flat before I do those.