haha, great to know i'm not the only one behind on the "needs" list.
wonder about the co2 though...
I know, from experience, that Co2 dissolves through the butyle tube of a bike tire. After about 24 hours the tube will lose about 50% of its pressure. You have to make it home, empty the co2 then fill the tire back up with "air", which does have co2 but also o2, n2 and other gasses that will not dissolve.
I wonder if this problem occurs with the rubber of a tire.