The full fuselage kit by Top Flite used a formed balsa fuselage and the typical formed LE wing. I got a partially built one at a club auction. Upon a closer inspection, the ribs did not fit well and the builder had run the leadouts out the wrong wing. When I looked at the fuselage, many of the parts were missing, including the formers. Fortunately, I have a set of the magazine plans that I bought when the full-fuse Peacemaker was published. I proceeded to build a fuselage the GMA way and had misplaced the kit parts so I couldn't find the tail section. In a mixture of disappointment and disgust, I sat the whole project aside. I'll get back to it some day.
If you build from plans, the fuselage is built with parts jigged together for maximum strength and minimum weight...probably because GMA was also a FF flyer. You could simplify it but I chose to build it as designed.
If I remember correctly, GMA said that one built by a friend flew better because it had a simpler (lighter) finish. I THINK it was also powered by a glow .25.
George