Steve, On Patagonia's website, there is a video with one of their sponsored climbers going through the gear he took to Nanga Parbat. The stove he had looked like a MSR Windpro (he didn't mention brand names, just pulled stuff out of a bag and talked about it). Whatever it is, it has the hose on it. He made an interesting point-titanium may be lighter, but aluminum conducts heat better. He had a homemade heat sink for his pot-looked like it was made from roof flashing or something similar.

He mentioned doing just what you suggest-using a canister upside down. The Coleman like Jim and I have has an adapter you can buy to do the same thing-run it with a standard canister.

The last thing I need is another stove, but a stove like the Primus Gravity MF II is tempting. Which one were you using?

ps. How was the Yellowstone trip?