Hey Greenie, I spoke with John about making me a HX for a 10,000 watt generator powered by a 13 HP Briggs. He said he has one to fit the unit. I never thought to ask him what kind of heat I could expect from it though. Do you think i'll need to post heat? I will be running about 200 feet of hose and the wand will have a .6 total jet opening. My pump will be set at about 400psi and about 1.5 - 2.2 gpm