I guess we’re not on the same page. I’m talking about completely new high tech guides installed from the bowl side with an integral vein, taper, slight helix, and shouldering up against the roof. The vein could start just slightly less than the opening behind the valve which was mentioned to be somewhere between 1 5/8” and 1 3/4”. This would allow for a vein of up to 7/8” from the valve centerline. As far as using G13 goes it will only generate a circle starting and ending at the center point and I plan to take full advantage of my software by generating point to point surface contours. The tool I have allows me to roll part way around the corner as shown here:
