This isn't a Pan-unique problem as it seems to affect all bikes with alloy wheels.
I was always taught to check tyre pressures at least once a week, but there's little point if I can't put more air in if I need to.
I can check my tyre pressures but I have yet to find a forecourt airline that I can get onto the valves should I need to add air. This problem is definitely more pronounced with the rear wheel of the Pan. With my Bandit I could get the air line connected if I had the wheel in just the right place, even with the panniers off I can't get it on the valve.
Have I missed something?