i was there helping do the demonstration at tanney hill ,showed fogg a few things about building a burner that works great without a blower, the main thing is to get the flame to focus right to the tip of the burner inside the forge. it will be light blue the fire coming out the ports needs to be orange looking , neutral.i have built many small forges , using my burner design for my frinds that will go from you can barley hear it run , to screaming hot in a minute , and don't use much gas.