We are discussing your nice design, over at bplite forum: http://www.bplite.com/viewtopic.php?f=60&t=4955
I have had a long running thread "small wood stoves for "hunter's tents" http://www.bplite.com/viewtopic.php?f=60&t=4539 over at bplite forum. You may be interested in seeing other wood stoves meant for backpacking and more tipi's collected from around the internet over there.
http://www.bplite.com/viewtopic.php?f=60&t=4873 has online calculators for "smokers" that compute the intake, firebox volume, and stovepipe diameter relevant to wood stove design.
Also, now that two diameters for Ti-Goat Stove Pipe parts are offered, it is easier to see a 3" stovepipe isn't the only available option.
I offered this information, because it is so true:
"The problem with a smaller stove is continuous feeding and when stored the chimney and bits would not sit inside so you end up with some wasted space".
What are the dimensions of the steam trays?