Nick, I think you have a Genesis B/C manifold or maybe an old Spirit.Update guys... so I went to Home Depot this afternoon and pick up my first propane tank came home, hooked it up and it fired up no problem. Where the problem is there is no adjustability with the burners in the low-med-high settings. It will control the flame as I close each valve but I’m not sure if that is a safe way to regulate the flame. So currently on the grill now is the original NG manifold with the NG valves with the LP orifices. The only reason I did this is because when I went to install the LP manifold it wouldn’t fit. The mounting holes were 1/4” to narrow the spacing of the valves on the manifold were to short also 6” center to center while my NG manifold was 6 1/2” center to center. Also the LP valve stems were too short measuring 2 3/4” while my NG valves are 3 1/2” long. Do I have a different model? Is there something else I can try? Any advice would be appreciated thanks.