https://github.com/donetick/donetick is pretty good

I’m using Anycubic Kobra S1. By default its probably not the most open printer but you can install Rinkhalis to make it work with Orca slicer.

Its been in LAN mode since day one, haven’t seen any outbound requests from it.

Why do think they should be here? Aren’t they just regular parts, just more repairable. They don’t have any extra openness on firmware side, do they?

You can give this a shot, it’ll cache the until you are back home then it’ll upload all of it. Plus it barely uses any battery. https://f-droid.org/en/packages/net.eneiluj.nextcloud.phonetrack/

Migrated from NC to FileBrowser Quantum and its super light weight. https://github.com/gtsteffaniak/filebrowser