My First CoreXY

[curious aardvark]

so how does the sensorless homing work ?

There was a post or thread or video i watched recently (well this year) about someone with a similarly size machine who had a stepper motor at each corner. So that the auto levelling was ACTUALLY auto leveloing.
That sounds like you kind of thing :-)

I've never had a bed move when the power is off.
Admittedly all three of my vertically moving beds are held only at the back, but even without power, stepper motors don't turn all that loosely - after all the magnets are still working.

Polycarbonate is going to be your hi-temp superstrong friend :-)

And i have some sample filament of polyamide - also fairly hi-temp and supposed to be super strong - I've never been able to test the polyamide stuff: https://www.bcn3d.com/product/pa-bcn3d-filaments/

Good for up to 120c - given that most car radiators will have blown by that point - ought to be good for some parts of an engine.
And a LOT cheaper than PEEK (what isn't ? )

So despair not - you will not have to fall back on pet-g - which to be honest really isn't all that. It's soft, bendy and nowhere near as strong as pla.
Polycarbonate and polyamide - are both well within Cuboxy's usage parameters.
Yes, it has a name :-)

They might even come in colours :-)

There are probably more engineering plastics around (hell I've probably got samples of some of them).
PEEK's the top dog - stronger than aluminium - but the rest are all still pretty amazing :-)

The polycarbonate filament can withstand temperatures ranging from -150°C to 140°C,

But doesn't like uv light - so not good for outdoor usage.
https://www.3dnatives.com/en/polycar...ng-110220204/#!

Can you not build a shed for the printers and set up a bunch of networked cameras ?
has to make more sense than a divorce ;-)