Yeah the duets aren’t cheap but they work well. I have kossel printers and they are a whole new level of fun. I have an rpi configured as a router to the duet ethernet. It’s on a private subnet. I’ll have to check out superslicer.
So that’s a delta?
You should check out Klipper for the firmware. For me, its the bomb. It does support deltas.
https://www.klipper3d.org/Features.html