Let's talk woodgas.
quoting Fritz: "The next development in the Bushbuddy saga came when Ryan Jordan at BackpackingLight purchased one of the new Bushbuddy stoves. He was impressed enough with the secondary combustion to ask me if I could make him a 6 ounce version of the stove. How could I reduce the weight? The obvious place to save a lot of weight, and a lot of work too, and potential problems of fit, would be to eliminate the base that the firebox sat on. By rearranging the internal construction of the stove to allow eliminating the base section, and by using even thinner metal for most of the stove, I was able to achieve this goal. Soon afterward, just before his upcoming Arctic 1000 trip in 2006, he asked me if I could make an even smaller stove that would fit inside his Snow Peak .9L titanium pot. I built for Ryan what turned out to be the prototype for the Bushbuddy Ultra.
As they say, "the rest is history". Ryan ordered a hundred Bushbuddy Ultra stoves from me, and popularized the stove. I discontinued the larger model Bushbuddy, and started making a new "redesigned regular model" that was the same size as the Ultra.
Ryan Jordan received the untested prototype that Fritz made and took it on his Arctic trip. Came back and ordered 100. As the original design got smaller and smaller, the problems got bigger and bigger. Ryans prototype design sold like hotcakes. Anything that Ryan used sold like hotcakes.
The current BB can only accept 1.5 inch length twigs, anything longer than that will block incoming air from within the double wall. Blocking those holes negates the function of the double wall. If you fill the stove with twigs to overflowing, which most people do, the double wall is not necessary.
Addison, I suggest you make a single wall stove. Let the folks in the 3rd world countries make the double walled so called woodgas stoves with their electric fans. There is no such thing as a woodgas stove in the backpacking world. Even Fritz made a comment that there is no woodgas coming up the double wall. It's just warm air. It's in the interview that we were given links to. I repeat, no wood gas in the double wall, just warm air. Fritz has been making wood stoves for a long time and knows what he's talking about.
I purchased a Bushbuddy stove used on ebay. I did extensive testing and found it lacking in many respects. The results of those tests are located at my website, www.bplite.com in the "wood Stove" forum. After tests were complete, I sold the Bushbuddy, resale values hold high.
Brent driggers had a bushbuddy and sold it. Brent has logged in many many hours of wood stove testing and is conidered an expert in my eyes. When you burn cords of wood, you get a good undertanding of how wood stoves work. (mini cord) ;-) Thanks Troy for all that you've done for the wood burning community.