Deburred and edge-finished the forward center ribs & seat belt brackets. Cleco'd everything together and drilled the F-805D brackets in place. I'll match drill everything else tomorrow.
One thing I do need to know, though, is what to do about the seat belt lap strap brackets. The gap between the two halves of the bracket isn't large enough for the Hooker harness attach lugs, so I need to put a bend in there (which is what the lines are for). Not sure whether to bend both halves a little each way, or one half only, or whether my intended bend location is ok: the trouble is, I don't know what else might interfere if I put the bends in. Hopefully someone on the VansAirforce forums will know...