https://www.reddit.com/r/printers/comments/qcstzv/downgrade_... (in German)
https://github.com/CauldronDevelopmentLLC/oh-brother/issues/...
https://www.reddit.com/r/printers/comments/w60687/comment/ih...
https://www.reddit.com/r/printers/comments/w9bc3g/downdgradi...