I was able to get duplex working with brlaser. Definitely recommend it!!

Good information! I may try this tonight. I like everything about my Brother laser printer except that I have to have an old computer sitting next to it that does almost nothing but print stuff.

I've got mine networked with an old Orange Pi using some old cell phone charger plug running the brlaser driver and it works great. Before that, I'd always have issues between Mac/Windows/Linux for seemingly no good reason. I'm glad brlaser came around.

I will try that.