Step 1: Main Shape
Draw the shape and size of your control horn (depending on how big of a model) on a piece of fairly thick balsa wood. Then cut out with an x-acto knife.
Step 2: Adding Holes for Control Rod
Draw circles on the control horn where the control rods go through (I recommend multiple holes). Now get a thumb tack and poke holes on the horn where you put the circles. Then wiggle the tack in the horn so the holes are a little bigger (do this accordingly to the thickness of your control rod).
Step 3: Finish!!
Now your done!! When you put this horn on the model I recommend using epoxy to glue. It is surprisingly really strong and durable.you might want to sand down the edges except the surface you want glue to the model for a nice clean look. Thanks for reading my instructable and please give me some feedback. : )