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Gday Matt
The EQ6Pro has a 1.8deg stepper ( microstepped at 64x ) driving a 12-47 reduction belt, so it immediately becomes a problem.
You could always use EQMod to drive it, as you can configure that any way you want, but not sure if your motor is suitable for microstepping.
Also, your stepper already has a 150:1 gearbox built into it, and you mentioned having a 3:1 drive between worm and motor.
With a stepper, you need to work out the steps per arcsec ratio when comparing controllers, you cant just look at the wormwheel toothcount.
Andrew
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