I believe the stove will act normally...It would be an advantage to insulate the inside of the stove with fire brick and or a castable refractory....also the outside of it as well, notice ,they used some type of ceramic fiber on its outside, so as to get as much heat to your exhaust to run the bench...regular concrete in the bench is ok...read the article for particulars.....its no rocket stove, but, it will heat a bench for extended residual heating. and you get to use the stove that you have.....I don't think that trying to make a rocket out of the stove you have is viable. You will have a iron box with a insulated riser on top with a barrel....
