Hi gill, pleeease don't ask me to do anything technical with my computer. I am always amazed what people seem to do and it always looks sooo simple

Think your choise for Kata is great

Me personally would burn charcoal in a moroccan stove if i had to make a serious choice right now this minute! I agree that the cost of the genuine stove is equal to a winters heating bills

I can picture the moroccan job now, very pretty, made of beaten tin, it stands approx 16'' is 6'' round at the base 10''round at the top (where the charcoal is burned) has a handle like a beer mug and holes around the middle to allow air through (these may be adjustable). The top piece has holes in the bottom (like a cullender also to let air in under the fire) It is very light and could be lit outside so you would not fumigate yourself,your family and friends

You could make a support for it so it would not get knocked over.
My gas bottle is similar in principal.
Unscrew valve, cut the valve guard off bottle (after filling it with water) or BANG!!!!! with a disc cutter, then cut bottle just above welded joint. This will form your burning crucible. Turn crucible upside down and place on top of base. This gives an idea of where to put a door in the base ( it should look right) Put this to one side for now and concentrate on the base.
Mark door approx 6'' wide 3'' tall and carefully cut one side, top and bottom. Leave second side uncut. Weld a 3'' butt hinge to cut side. (can you see it now?) Cut second side and make a traditional door catch (similar to that of a thumb latch) There should be enough play in the hinge to not have to have any moving parts

I f you bend the side of the bar that runs across the centre of the door at 90 degrees after it goes past the opposite side of the hinge and beyond the catch, and drill a hole in it, you will have a handle you can get hold of to open it when it is too hot to toutch, using a bit of no 8 fence wire. This will allow air to pass inside under control.(you could make a nice poker later!)
Place the crucible in the finished base and mark where it sits. Remove again and either drill or gas 1/2 holes evenly around (about 30 of them) Fill in old valve hole with a nut or v thick washer (to stop coals falling through) Replace this onto base and weld together. Hey presto a charcoal burner

Oh don't forget to grind off the galvanising where you are going to weld, it makes life easier
I hope these are clear. good luck from Swyn