Propane is high pressure and natural gas is low pressure, so you will have to change a few things on your stand to make it work. You will need to replace the high pressure regulator to a low pressure regulator, the gas line between the regulator and flow control valves (needle valves) to larger size line, replace the needle valves with a ball valves, and drill out the jet orifice. You can control the gas flow in a low pressure system with ball valves. I would use one low pressure regulator for each burner if you plan to use two burners at the same time. That way the gas flow to one burner will not be affected by the other burner turning on in off.