Powered wheelchair that tilts for indoors and garden path UK

[Kitty]

I did a lot of playing around with the position of the armrests and the angle of the joystick bit before, but there may have been too much wrong to get very far

Yeah, I really feel for you—it is hard. The "right" thing might be a four millimetre adjustment, in combination with a 12 millimetre adjustment in something apparently unrelated. It's so much easier if you can sort all that out while you're still fairly mildly affected. Back then, as long as I had seats at a couple of different levels I could strip my chair down to the frame.

It's worth seeing if weight shifts make a difference when you're able, either by tilting the seat or being on a slope. if it does, that will give really useful information to the people doing the adjustments. They may not even have thought of gravity as a factor in that aspect of chair setup.