I have a 40lb propane cylinder that was once used on a customers zero turn that we have since converted back over to gas, want to use that tank on my forklift since it is a larger nice aluminum tank, it has the same threaded valve as my forklift tanks that I rent however the valve is on the vapor withdrawl side of tank and my forklift is set up for liquid, does anyone know if I can simply move the valve from the vapor side of tank to the liquid side of the tank and make this tank useable for my forklift? Thanks