I drew out the plan form I was looking for and overlaid the parts on it, I then made some castings of F-86D cockpit tubs and also of the FJ-4 fin to use. The plug that NAA inserted into the TF-86 was, IIRC, 67", which was so two full size cockpits could be installed. So I glued two F-86D cockpits together and fitted them to the port fuselage. I have made the tail planes in the same style as the wing, the wing center section is made of a top half and a bottom half with a spar added. This spar is an extrusion of the outer wing spar depths, which means it's thicker at the middle that where it joins the fuselage.
I did all this so I could verify that the idea would work and most important (to me anyway) look good. Now some life changing events have happened and I don't know if I'll have the time to finish it, but what with a number of other projects I want to finish and depending on how quick my condition changes, I'll try to get this one done too.
For the TF-86, NAA had moved the wings forward 8" to restore the cg of the aircraft, my thinking for my project is you wouldn't have to do that because I have a forward swept wing for the center section so it would counter the rear swept wings of the outer panels.