I think the BTT Octopus Pro 429 is a better option for a Duet clone. It has 1m of flash and will allow for a full RRF installation. There is just so much more available documentation, information, and youtube videos, and other owners online in groups, I mean the support for the BTT products at this point really gives their products the edge.

But I digress, there is new stuff on the horizon for BTT. They have redesigned the stepper driver with their EZ line and are making new boards to support these drivers. They have not yet made a Octopus equivalent with the EZ stepper support so you know that is coming. And it should be soon. Either way have you recently visited this website and checked out their new products and just seen what they have going on? New Arrival | Biqu Equipment