RE: Custom Fuselage
Got to the composite forum and look there for mold making and layups. Look also in the heli general tab on my Jet Ranger mold and Fuse discussion. We flew the original again last night. Pretty cool.
Glass is easier to build the final product out of. There are a lot of things to use for plugs. Check out the composite section and there are lots of good answers there. Also go to google and search things like mold making, fiberglass molds, composite molds and things like that.
Good luck.