I did one baseline test with less fuel as well, just to see what parameters made sense for additional testing. And for general practise and setup.
I used very cold water (just above freezing) to make it more of a challenge. Where I often camp (Canadian Rockies), the water temp is almost never above 10*C and often close freezing because of glacial melt.

I'm going to have to look at other types of stoves -- your article on efficient alcohol stoves has my interest peaked. I think I will build a couple more base on a smaller 8oz coke can. I don't like the idea of requiring a preheat pan, its just a bit clumsy. My stoves don't appear to be as efficient as I would like either.

Yeah the Xtreme with PowerMax fuel isn't playing fair but then again I still use this stove! I thought it would make a wide eyed comparison. I didn't think to weigh the cannister before and after to get the amount used. The Xtreme is also a lot noisier.