my old man used to make camping toilets and other stuff from 20l drums and yabby cookers from 120l drums and we did some stuff with 205l drums too just cant remember what it was now. and when we used to cut them up we used to fill them (full no vapour space) with water first it worked a treat just dont let the cutting wheel drop too far into the water or use an air grinder. i also remember some friends making a raft welding 205l drums together and oopsys didnt fill with water first and big big bang. verry lucky to still be here i want to make one of these little stoves when i can find myself a cylinder and ill be filling it full of water and cutting it with the oxy.