Actually, the rudder and vertical fin are built into the mold. It's a pain to make the way that I do it, but I have to glue in a block of wood when I close the mold up where the hingeline is. When the fuse is out of the mold, I then cut the rudder out along the line and should have an area where I can put hinges into on each side. I could skin hinge it, but never have on the rudder yet. I could also leave the wood out when closing the mold up and put it in afterwards. Either way works.

Michael