The Ring of Fire, also known as the Doodahman Special, when originally designed used 20ml of denatured alcohol to boil 2 cups of water. The use of 20ml is recommended. Use more under windy conditions to get the boil. In reallity, 180 – 200 degree water temps are fine for rehydrating freezer bag meals. We should'nt get hung up on the boil factor. Here is a link to the original thread that gives the history of the stove.
http://www.whiteblaze.net/forum/showthread.php?t=22425
Somewhere in the thread will also show the aluminum pot(my favorite) used to test the tab pot supports. Boil times will vary with pot size and material it's made of.
The stove is primarilly a section hiker stove. Knowing how gram concious thru hikers are 2 ounces is way to heavy for the thru hikers.
The proper use of a windscreen is manditory for all alcohol stoves. Used to close to the pot will cutoff necessary oxygen. Used to close will cause the burner to heat up the fuel prematurely and flash-of the fuel before complete combustion can take place.
The SuperCat stove is a great stove. I like it alot. I'm not too keen on balancing my pot on it though. I like how the Ring of Fire gives absolute secure pot support. Wider is better.