Often there aren’t definitive answers, and drying never hurts;)

Have you tried drying it? Sometimes filament is not dried out of the box.

That’s pretty hot for PLA

Some of the newer iPhones feature a LIDAR scanner and there are store apps that can use it to scan too

The K1 series has graphite bushings on the X axis which should be self lubricating and should not be greased.

How do you attach it?

Yeah, that explains stuff. I thought you might have had some stuff on Pi that you could’ve been running on the PC. In that case I’d recommend that you run the NUT on RPi, and set it to pause print on a power failure, possibly change CPU scaling (i.e. to “powersave” CPU governor if you’re running Linux) on the mini PC, or even possibly shut it down in an event when the power outage lasts longer than a minute.

Whatever would support the combined max wattage of the devices you will connect to it. Ideally something that can handle 50-100% more power. You can control some UPSes via USB or network, so you can hook it up to that mini pc or Pi (why are they separate?) and run NUT on it. You could technically pause a print/shut down a computer/Pi if an outage is more than x seconds to reduce power usage and get through one that you otherwise couldn’t.

Wait what?

But why?

And this is the kind of ideas motorists (as you describe it) have to face every day🤦🤦‍♀️

How is Gentoo doing these days?