Thanks for all your comments.
I used an 18.5 kettle and the SS bowl out of a 7.5kg front loader
It sits in the 18 perfectly. I have a red and maroon 18 that I'm going to try it on and yeah Ed it does look good with the red, I've kept it in the black because my last design tended to make the lid soot up and there's was too much heat in the lid, but now that I've cut the sides out and flipped the bowl there's no soot on the kettle at all so i think it will be going on a red. Here's a pic of how much ash came through to the ash pan after a 6hr fire
Here's another pic of the pit attachment
I cut 6 inches off the legs and it sits at a great height for everyone to sit around and watch
You could easily use this on a timber deck without any damage and its great being able to move it around
I love having a fire going at night especially for those over night cooks
Great thing is the clean up is easy, just tip the ashes in the bin , then wheel it in the shed till next time
Apart from the cutting down the legs there's no mods to the kettle, so it can still be used as a cooker