I haven't built my HVLP system yet but I've collected all the parts. My timer relay is a Macromatic THR-3816U (but the simplified plan would probably work fine). I'm Subduction:
http://www.talkglass.com/forum/showt...l-or-HVO/page2
I have a Mirage that will be using the HVLP for the outer ring; the center will be on one or two 20 psi, 10 lmp concentrators. Salt City Glass discounts concentrators during the winter.