Using X, Y and Z motor drivers as extra motors

ticso

Setup without XYZ motors.
In a pick and place machine project I will use one board for XY and another without any XYZ motors.
The free motor drivers would be setup as extra motors for special actors.
However it seems that I can't do a setup without X, Y or Z motors configured.
Would it be ok to just dummy setup them as XYZ and also configure them as extra motors?
Or do I need to redirect the XYZ motor configuration to free dummy GPIO?

Repetier

XYZ are only used when moving and you can set all to the same pin, that is no problem if you do not use them anyway. Or use them instead of extra motors.

ticso

Great - thank you