I'd appreciate some information regarding building a rotary tool attachment for a laser engraver. The rotary tool would be used with a woodturning lathe chuck system, hence my desire to build this tool rather than buy one with a 3 jaw chuck or one of the roller models.

I believe all the Morntech lasers use the same stepper motors (Kangda) and drivers (Leisai). Does anyone know the specific specs on the Kangda steppers or a know of another brand of stepper motor that is interchangeable with the steppers supplied from the factory?