There is a single cross brace in the middle if the fuselage. The layup is very light being only two layers of 1.4oz cloth for a outer skin, 1/32 balsa core and the inside skin a layer of 3.2 crows foot weave. Trying to install formers after removing from the molds would just distort the fuselage shape and be a major pain. My process to bond the formers in place is to tack them in place with CA and then do a fillet of laminating epoxy with a little milled fiber and micro balloons.
