I wasn't always sure how I was going to get here and I changed plans several times along the way. If I had designed it in the beginning knowing how it would take shape it may look a little different but would probably work just the same. To date the gas valves and ignitors have been the single biggest brewery expense. I have 2 valves, 1 for the HLT and 1 for the MLT. The BK is either continuously on or off.