If I'm going to cast the housing, I need a form to make the mold... now how to do that? Well, I have access to a laser cutter, why don't I break it into layers. Throw some melamine into the machine and here's the bits I ended up with:
I meant to have more pictures in between but I got so excited after they started popping out, I forgot. Layers of each, glued together should give me my final form.