I guess what I'm really hoping for here now, seeing as I won't be looking for any equipment for a few months yet, is whether there are aspects of this design (other than the supercharger, as I will most likely outsource that) that would be particularly challenging to machine, or that should be changed for the sake of ease of manufacture. And of course any comments as to particular design funcionality or practicallity. Don't be afraid that I'll get sore, I really do appreciate constructive critisizm just not statements like "it will be more work than you can handle" or "it just won't work". Thanks you've mostly been very helpful so far. I just reinstalled windows so I have to also reinstall Sketchup. As soon as I do that I will export a pic of the manifold I have drawn. I'm sure it's all wrong but I have to start somewhere. Let me know how to change it and what the best way to fabricate it would be. Is aluminum/iron casting beyond the scope of the home workshop? I sure hope not.