I have a Nature's Head, too, and I'm very happy with it. Warranty service (for a broken handle) was hassle-free. Feel free to PM me with questions. Also, the manufacturer was very prompt with answering my questions.
I really want to do this for my build; but in researching, I read the critters quit working at 64F and die below 40F. math at would seem to be a problem for boondocking in cold weather.