@bricor I considering deux board only for further development of some other functionality. On idex printer to use duex board for only one step driver there is no sens. One of reason for this is that DUET is very well documented. There is no reason to destroy a board.

https://duet3d.dozuki.com/Wiki/Using_external_stepper_motor_drivers

Here are and the commands for setting firmware.

I look little more on DUET wifi wiring diagram. I can connect TMC2208 Stepper Motor Driver module/board directly on DUET 2 expansion connector. For example on pins 4,5,6,7 (E2-stop, E2-step,E2-dir and E2-en).
Is this correct?

I don't want to use duex board. I was talking about expansion board.

Is it possible to use this:

https://duet3d.com/Expansion_Breakout

On this connect additional step drivers compatible to TMC2660. I cant find board with TMC2660

I am building idex printer. I need additional stepper driver for x axis. What stepper driver board you recommending me to connect on expansion board for aditional X axes.