I got a lot done tonight, but sure doesn’t appear very evident. Deburred all of the seat floor stiffeners, then clecoed them to the left and right seat floors. Drew a centerline along the rear seatback hinge, then clecoed it the to the rear seat floors. Match drilled (#30) the floor to the seat hinge. Then final drilled #30 the F830B1 floor stiffener and the F830F1 stiffeners, leaving the outer holes at 3/32”. Then match reamed these outer holes to #41. Match drilled #40 the keeper rivet hole into the F830F1 stiffener. Still not quite sure what this keeper rivet is for. Next I fabbed a small piece of .025 skin to fit under the hinge on the right floor skin so as to smooth the bump where the hinge overlaps between the left and right floors. Manual says at this point to remove all stiffeners and deburr, but never mentioned match drilling the stiffeners to the flooring. So, I match reamed #41 all of the stiffeners to the floor skins. Now it is ready to be disassembled and deburred.