Awesome work man! I love doing this kind of stuff in my free time, too! I don't know enough to design a bunch of stuff like you though. I had a quarter of basic electronics lab in college and still have the book so maybe I'll pick it up and read it. For now, I just use other people's designs. lol The biggest thing I've done was putting together a fuel injection controller for my jeep. My next project is going to be building a programmable aquarium controller. So, I'm interested in how you etch your boards and all that jazz. P.S. When are you going to be design a 'Power Commander' for us?