Some useful links I remember using back then: https://www.reddit.com/r/printers/comments/qcstzv/downgrade_brother_mfcl3730cdn_printer_firmware/?tl=de https://w

Some useful links I remember using back then: https://www.reddit.com/r/printers/comments/qcstzv/downgrade_brother_mfcl3730cdn_printer_firmware/?tl=de https://www.reddit.com/r/printers/comments/qcstzv/downgrade_... (in German) https://github.com/CauldronDevelopmentLLC/oh-brother/issues/30 https://github.com/CauldronDevelopmentLLC/oh-brother/issues/... https://www.reddit.com/r/printers/comments/w60687/comment/ihkkjn9/?utm_source=share&utm_medium=web2x&context=3 https://www.reddit.com/r/printers/comments/w60687/comment/ih... https://www.reddit.com/r/printers/comments/w9bc3g/downdgrading_brother_printer_mfc_37_how_to_find/ https://www.reddit.com/r/printers/comments/w9bc3g/downdgradi...