I cleaned and primed the rear spar parts. But then I noticed I had not dimpled the rear spar flange and reenforcement plates which will eventually receive revits from a skin. So I dimpled those holes as well. Then I clecoed them all together and put clecos in the holes that will be used later to attach ribs, hinges and other things. Then I revitted the parts to the rear spar. Its done. I used the squeezer on all these revits.