IBeam steppers the same?

Hello,
I was wondering if the gobo and general steppers are interchangeable between the 400 and 700hx models of the intellabeams?

Also, I have a unit that will not properly index the gobo wheel, moving it only 1.5 gobos instead of a full rotation. Is this an issue with the stepper? I swapped sensors and boards and it made no difference. The only extra steppers I have are from a 700hx so I want to be sure its that before I go and resolder connectors.

Thanks
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