http://www.youtube.com/watch?v=pC5mwOJ2Khg I made some of these paper cases up, conical superglued to a fag paper case with fine semolina and then 20grains of black, but I thought why bother with the glue, I then made up some with just the filler and powder (both ends twisted closed) by the way it has to be fine semolina or the bp grains will "flow through" and mix with the filler in the paper case