I'm having the same problem with gas leaking on a model marked T06 055974. What year would that be? It's sealing at the neck of the cartridge, but leaking through the ports above.

Anyone know where I can get some spare seals? And I'd like to reinstall the original screw in the magazine, but can't find them either. Someone has snapped the screwdriver bit on the tool, a replacement would be cool, but a wide screwdriver will do if I can't find one.