I've been trying to think up a way to shape a neck other than the the typical way using rasps and whatnot out of fear that I will horribly screw up and have a useless pile of neck crap. Is it possible or feasable to simply make a mold of a neck that I already have and strap some sandpaper to the inside of the mold once it's hardened? After you have very very roughly shaped neck you could then start sanding with the molded shape into the neck.
Go for it! 