i,m having a couple of woodburners made from a friend ,one from a gas bottle and one made from steel plate along the lines of the windysmithy ones. anyway what i am not sure about is what to use as a chimney, i want the chimney to be as light and practical as possible , the stove will be used inside canvas tents .so any ideas and what diameter of pipe ,i saw one of the forum members used food cans ,and wrapped them in light metal as found on olive or oil cans ,which looked quite good.