I recently fixed a bug in the gear cutter. It was not adding in the tool radius, but it otherwise was generating good code. Be sure you select one of the 4 views in the upper right corner that define which setup you are using- cutter in front or back or work and direction of travel.
My corrected wizard has been sent to Art to include in the next Mach release, but I think it arrived just about the time he left on vacation. It should be in the next release.
The code generated does uses a subroutine for the Y moves, the code you see in the gcode box is just the main routine. The subroutine is placed in teh Subroutines folder and is called Index.tap
I have not looked at the spline wizard yet, but I have heard it has a lack of features. I will be looking at it soon
ron ginger