Before I sold my FC660C, I took it apart and lubed the sliders a few times with trybosis 3204. It was my first time taking apart a keyboard and wasn’t particularly difficult and the stabilizer keys are really just wider regular topre keys. There is a wire, but it’s inside the key instead of over top like cherry. A good set of tweezers is all you need. There’s a good video by Taeha Types about lubing an HHKB which was not all that different. I’d say the most tedious thing about it was just how many screws there are holding the PCB to the plate

A few things to watch out for:

• be careful about the ribbon cable that goes from the main board to the daughter board that has the usb port on it
• try and keep the domes from separating from the PCB. there shouldn’t be any reason to remove them and they’re held in place with some sort of adhesive. I’ve heard if you take them out then it’s a pain getting it all back together.
• if you take the sliders apart you may break some plastic tabs on them, but that’s normal so don’t worry (see any video about lubing topre)

Feel free to reach out if you have any specific questions! :)

I may be wrong but I believe that all of the systemd programs are decoupled. You can run the systemd init system without any resolved or networkd. They just happen to be used by default on a lot of distros.

Mechmarket might be a good place to check