Rick,
If you are going to convert to CNC the digital depth read out would be moot since Mach3 has DRO "readouts" for all axis.
I am way to frugal to spend the additional $600.00 for the Grizzly options.
A $23.00 index pulse card will interface with Mach3 for very accurate speed readout.
http://www.cnc4pc.com/Store/osc/prod...roducts_id=129
A rotating feature could be accomplished with a inexpensive slotted plate between the head.
Jeff...