[glennword]

I actually just designed one of these recently, with the ability to stack built in. Most all of the parts are designed to be waterjetted/lasercut/routed or some other form of 2d machining. That way it's relatively easy to manufacture. There are numerous videos and whitepapers/pdfs on the subject that I used to generate the profile and do all the other math. Here and here and here are the three videos I referenced the most. This this this this and this are also very helpful links. Enjoy!