@oliof I think it's an operator / config.g writer error.
I mean: wiring wise, what's there to screw up? The box I printed had 1 and 2 next to the holes where the cables go. The cables are keyed, as are the receptors on the board. I don't think I screwed that up (but it's possible).
The problem is me. I've just never done any coding. Duet's documentation is good, but it seems to ignore the amount of coding must do to make the board AND the printer actually do anything.
I say that not with malice, but out of my frustration. And my high blood pressure, which is killing me today.
Mark