I'm awaiting delivery of a 1062 to run four steppers, to build a coeliostat (two mirror heliostat to direct the beam into a bench mounted SolarScope without field rotation).
I.e. Two axis control on two different mirrors.
Should work fine, the sun only moves at 15degrees an hour, so a stepper with gearbox or gear set of some sort will help keep the speed down.
Do you plan to run open loop? I.e. just run the motors at a fixed rate? Or closed loop with some sort of sensor to actually track the sun?