I was inspired to do that by this thread :http://www.backpackinglight.com/cgi-bin/...thread_id=19345
The ingenious part is the chimney and you just buy that from TiGoat...
What took me some time to find was something that was in stainless steel, not too heavy, that could collapse or store a pot and bits inside it without wasting space in the pack.
The tricky bit is that the chimney collapsed is a foot long , so I had to work around that.
I made a much smaller one using a 1.7L water pitcher but it does not transfer the heat to the pot efficiently as (IMHO) any of the round tops also don't.
If you look at the video you can pretty much see how it is done.
Just a hole in each corner for the leg to go through, and somewhat round hole for the bottom tray (for air inlet) that has a sleet in the groove above the hole to insert the cover for that hole.
The top tray has a bigger hole . The door is made from a 1 gallon olive oil container,. The "knob" is a piece of champagne cork with a bit of fire blanket in between it and the metal. (screwed in)
The legs are 4 bits of Easton poles with a screw and a couple of nuts inserted.
(I will post a pic later as it is the middle of the night right now...)
The bottom of the legs are chop stick (the hard re-usable type...)
Collapsed it is 10.4" long.6.5 wide,2.75 high. In use it is about 4.7" high.
With a 4" pipe it would be 28 oz, about 33 with the 7' pipe.