I gotta say...that's one damn cool (and thoughtfully designed) piece of work. Definitely for the completist, but I must say this - as a guy who owns a grand total of one (1) Ball Python, and who believed that anything less that a Herpstat Pro wasn't good enough, I commend you for your design.
I know lots of snakes get along quite well with a tub, some flexheat strips, and a Johnson thermostat. But to me, simulating the snake's natural environment as closely as possible can only enhance the animal's welfare.