I readied the aircraft Saturday night, fuelled and provisions loaded, I planned to have a trouble free departure from Pitt Meadows, Vancouver. I had been thinking about the number of tailwheel flats I have had over the past few years so I decided to ensure that I had enough inflation of the little wheel. Seems, under inflation might be causing sidewall flex and the inner surfaces of the available tires seem to be a bit rough. So I decided to inflate the wheel to 45 PSI. I also though I'd use a inflation valve extender to make the job easier. The next morning I had put all the wheels in motion, the flight plan, the Eapis and the phone calls had been made. I got Mary Anne and I to the hangar early for a stress free departure, opened the hangar doors and rolled the plane forward. Then I heard the sound of rushing air, unbelievably I had left the extender on the valve and rolling the plane forward had caused the brass valve to snap in two

I had a spare inner tube and with Mary Anne's help, lifted and rested the tail onto a Coleman cooler. I changed the tube in 20 minutes and made our departure window, but I was stressed. We made our way east, passing two forest fires on the Canadian side before crossing the border at Oroville where another fire had just begone. We arrived and cleared customs, fuelled the plane and headed to Missoula. We climbed to 9500 ft from Oroville , went direct avoiding two TFR's due fires and despite the haze managed an uneventful arrival.