Not my favourite loom

I have managed, after having to call my sister to bring her bigger car, to get my loom home.  I will be able to work on it at weekends and maybe some evenings rather than just the times I can access the tapestry classroom.  I am hoping to be able to finish it by early November. (Going away for three weeks won't help with that.)
However, the loom is not a great design.  I have been using it on a table but the weaving was getting a bit too high and I was having to lift my arms too high, even though I was standing.  Now that it is at home, I was trying to find a comfortable way to sit at it but it is just too low.

I tried using one of those fitness balls that someone gave me.  It is going a bit flat which was useful as I could sit lower on it.
My back started to object (having to lift the dog around the place after her operation has not helped in that area either), so I tried sitting on a cushion on the floor.  Not much better.
I'll have to think again, try different solutions.