Riveted rear spar and rear spar doubler together. I put the manufactured heads on the forward side but realized later that they might should've been installed the other way. I didn't change them so hopefully they're won't be any clearance issues with the elevators. The plans didn't mention which side should have the manufactured heads at this stage but Pg 8-12 mentions the manufactured heads when riveting the inspar ribs should go on the spar. When riveting these together take note to leave some holes open and some will require flush rivets. Attached 4 sets of hinge brackets and inboard hinge assembly. I torqued the nuts to 40 in/lbs. The chart in Ch 5 says with these nuts to use 28 in/lbs then I measured the resistance of the nut to be 12 in/lbs. Therefore, I went with 40 in/lbs.
