I have always been told that a full fuselage can be built lighter than a profile fuselage, using the same outline. It only makes sense since there is less actual wood and more *air* in a built up fuselage. This is considering the traditional solid wood plank for a fuselage. I am think that the *built up profile* fuselage technique might dispel this theory, though, since you are entering *air* back into the equation.......