Thanks @jugglingmum - it all makes sense now! That's quite a project.https://project.theownerbuildernetw...d-fired-pizza-oven-built-using-exercise-ball/
I've googled now and here is our answer
My LD(long distance)BF is more of a 'make it worse' man than a 'DIY' man. I know @Ann Mac is a very generous person - I wonder if Mr Mac is available on loan...?