Ok. Back to the project. Used long bucking bar to install rivets on the rear spar of elevator. Not an issue at all, #3 rivet gun @ 37PSI. Used PVC pipe on pop- rivet squeezer for leverage on inner LP4-3 blind rivets. Rear spar LP4-3 bilnd rivets were easy with the Harbor Fright Pneumatic Squeezer. Front Spar a little difficulty with rolling rivets (mostly cosmetic, sorry Tony B) I think we need to use other longer dies for the pneumatic squeezer as I suspect the long travel may be the issue.