I thought I had finished fettling my old Optimus Campingo 1, but it turns out the fuel valve is still leaking after about 10 minutes of burning. I think the reason might be that the stove is likely modified and the silent burner is not original so I ordered the wrong lead gasket. Does anyone know for which burner this valve spindle is for? It looks similar to my Optimus 5.1, but not sure it is the same. I don't think I have a cleaning needle in the Campingo 1 (modified) burner either. Attaching a photo of the Optimus 5.1 burner as well.