@cgallery - I have thought about counter weights but it then makes the logistics and the way the machine handles much more complicated.
I actually had a mini breakthrough last night. In my pack of 200 springs from amazon they offered no more springy-ness than the original, however they were held the diameter - as a result I can double them up without hitting the x extrusions like the original, which gives me much more confidence in running the machine (which I’m yet to do).
Currently I have 4 in place (2 each side) and it supports the spindle in a neutral way - it doesn’t pull up but doesn’t fall down much either. I might add an additional spring or 2, I will post pictures this evening.
@dtilton71 - I’d love one of those (love is a strong word) but it’s currently out of budget since I spent all this months pay on the spindle…