I've been playing around with my 530 I recently bought. I put on a M1950 pin, generator, preheat cup and burner. The generator and pin are unused extra parts I had in a M1950's pump handle. I have tried to light this and run it periodically and the first two times, it ran fine. I'm having a hard time lighting it now AND when I remove it from its carrying can, there is a slight amount of fuel on the bottom of the aluminum can and on the defuser plate. I can't see any fuel leaking out, but I did notice a little fuel on the bevel under the fount. I did fill it a little before I put it away, could it be just spilled fuel or do I have a slight leak? As far as I can tell, it did hold pressure while stored.