This is very close to what I am building, even the same tap handles, lol. Only thing I'm doing different is mounting my taps separate from the Kezzer. Well done .
Something like this
http://www.ebay.com/itm/170963748559?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
or search for " SCR Voltage Regulator Speed Governor Thermostat "
Can't think of any Brew related ideas, but I have had an idea for a few months to use my old range as a smoker, piped up to an old wood stove. Might be crazy.