I cleco'd the top skin, roll bar, and top brace/channel into place and match-drilled the aft rivet holes through the brace/channel and its spacer (not visible). I also matchdrilled the forward rivet holes mating the brace/channel to the roll bar mounting angle, and slapped the side brackets into place. Everything is match-drilled.
BTW, this assembly confirmed the quality repair work my USAF buds did last summer on the top fuselage skin. EVERY rivet hole lined up perfectly.
