Here is kind of a quick look at how I made my splitter board and mold for my wing. I am far from an expert but a couple of people asked so hopefully they will try themselves.-OH BOY the UPS guy just dropped off my new Futaba 8FG- I will do this before I dig to deep into that.

First off you need to make a splitter board that divides your plug be it a wing like this one or a fuselage. I used some melamine shelving material from home depot as epoxy doesnt like to stick to it.

#1 I layed out the dihedrial onto one piece. This will end up being the frame.

#2&3 I cut it out with a jig saw and screwed the frame together. Make the frame several inches wider all the way around to give yourself room for a mold flange