Old post but worth discussing. When I was 13 I built my first Ringmaster. S1 and a Stunt Fox 35. I wrecked it several times. Always rebuildable. An AF Sgt made several S-1 fuselages out of scrap Balsa from the Base pallet shop. I bought one. And salvaged my original S-1 and used the four inch longer Ringmaster fuselage. One inch in front of the leading edge, and three inches aft of the trailing edge of the wing. Installed a tail wheel and it really flew great. I don’t thinkI added weight in the tail but my outboard wing had one and one half ounces added. 58’ Sullivan lines .015.AJ