Kevin –
Actually, my "two burners" are actually my one stove taken apart – I just placed the outer can over the inner fuel chamber over a piece of flashing, since I was in a hurry. My post a few entries above describes the measurements. The outer can (60mm diam, with a 24mm diam center hole) has 12 holes, the inner one (53mm diameter) has 10. Without actually seeing a 12-10 stove in person, this was the closest I could come from available images and descriptions on the web. I wonder if the lack of a "seal" contributed to the bumping/flashing phenomenon.
My system did burn hotter (apparently) than your ideal 8 minute/15 ml, since it boiled in 6 minutes with 15 ml. I wonder if this is due to the decreased venting in my cone. Maybe I should add a few more holes to keep the cone from excessive browning.
I'll try getting some materials for the red bull stove you suggested.

At a recent flea market I picked up a pan called the PERFECT PANCAKE.It is Teflon coated and 7 1/2 " dia. This is a two piece pan, your are supposed to be able to flip it over, to make perfect pancake. Dumb idea, I took it apart and it makes a good light weight fry pan. I kept the deeper pan and am giving away the shallow side.I fried an egg on it,no problem. Here is a photo, if anyone wants it e-mail your address and I will send to you, just send back whatever the postage. e-mail 


