Hello Bazzer
the early Stepfours with the CF1 and CF2 electronic boxes work fantastically well on Mach 3, in fact Mach 3 transforms the machine into a usefull little piece of kitClick image for larger version.  Name: DSC_1716[2].jpg  Views: 512  Size: 82.1 KB  ID: 20080

I produce G code with BobCAD V29 and do 2.5D and full 3D machining on the Stepfour, cut sizes and machining stratergies need to be well thought out but the results are pleasing.

The only problem is that there is no control of the spindle using the Stepfour/Mach 3 combination, I am going to work on this in he New Year. Currently the spindle is manually controlled.

Regards

Barrie