@KenK:
You're right, it's the O-ring between the pump and fuel bottle that's the most critical. Mine is showing many obvious cracks. If/when it fails, it would pour out pressurized liquid gas a few inches from an ignition source. Yikes. I worry less about the stuff downstream of the main valve, but at this age it needs maintenance.

BTW, when I used to fire up the old XGK in camp, I'd tell my DW that I was going to "fire up the space shuttle." Crazy hot stove, but wow it's loud.

@7point82:
Thanks, I wondered whether Superfuel was just hype. Do you think you get more meals/pots of tea out of a litre of Superfuel compared to ordinary white gas? Just curious.