Mike,
The Turning wizard has a number of wizards which you can use.
Use the OD Taper 2 wizard for what you want to do. If I recall correctly, angle input value is the "total angle"
not just one side.
May want to consider / learn LazyTurn which is free and there is a manual for it. Basic, easy to use program
to provide gcode for outside contouring.
RICH