I've just installed the M477fnw, and successfully configured the Fax feature. After configuration, it displayed a message indicating that faxes would be printed using color cartridges until they reach "Very Low," and that the setting could be changed in Supply Settings. Unfortunately, it appears that I can only adjust the threshold for "Very Low" warnings, and it's fairly important that I force faxes to print via the black cartridge at all times.
I understand the "reason" behind the default setting, but frankly I'm happier only using what I need rather than spreading the load. Will I need to set the Very Low threshold to something like 90% to avoid this issue?