So I found this guy on Youtube, his name is Bryan McGrath. He makes videos on all kinds of fascinating organic stuff.....he also redefines the words long winded. Its to a point were I'd rather chew off my hand than sit through his videos. so instead of putting you guys through that, I thought I'd re-introduce his ideas in picture form, but I want to make sure it's clear that I learned about this stove on his channel. he calls it a T-LUD, standing for top lit- up draft. I think that's stupid, so I call mine a biochar burner. you can call yours whatever you like. Ok first you will need: work gloves a metal coffee can OR paint can a 2 gal paint can OR one of those tin things you get at Christmas filled with 3 different kinds of popcorn, that's what I used a few sheet metal screws a 6" to 4" flange/reducer $7 at HD 4' of 4" duct pipe $8 at HD a power drill a bit that will go through metal(little one and big one), a step bit would be best, but where there's a will, there's a way first you will drill some holes around the top rim of the inside can with the little bit, about an inch or so apart. then drill some holes in the bottom of the inside can. not too many, you only need about 15-20 holes in the bottom. i went overboard here. we don't want it to breath too easily. measure the hole in the inside can, that's how big the hole will be in the lid of the outside can. find the center and draw a circle as big as you measured, then cut out the hole. (PUT GLOVES ON!!!) next you will line up the two holes and attach the lid to the inside can with some sheet metal screws Ok now switch to the big bit or step bit and drill out six to eight holes in the bottom rim of the outside can, and one in the floor for good measure. done. with the same bit, drill six holes in the 6" side of the flange, and four holes halfway up the 4" pipe. this can be tricky, I used a 4x4 behind the metal and it helped. make sure everything is snapped tight and straight and your done!