I've seen a few 37% Godfrey Extra 300's with a split fuselage. All the points about extra weight etc. are correct ofcourse. It does work, but personally, it always made me a bit nervous to trust keeping the tail on via the method I saw and it was heavy. It was basically just a pair of mating thick ply plates with guide dowels and metal bolts, so there was a lot of concentrated stress on those bolts. It might work better with 3 or 4 smallish CF tubes, similar to how we do wing tubes, to allow the stress to be distributed longitudinally and not be carried by the fasteners. Then, you could just use a few nylon bolts to join and not worry about vibration undoing them in flight.

Done correctly, it might not add alot of weight and could be worked into the strength and stiffness of the structure fore and aft of the mating point. I'm thinking that by integrating them to the structure along the outer edges of the formers it could work out.