John,
Just how 'difficult' is it to be able to see the CTE line along with the edge to A, B, or C line?
That seems rather simple to many of us & should not take 'any' real amount of time to 'learn'.
Best Wishes.
Shifting 1/2 tip to the right or left as required prior to pivoting, if pivoting is used, results in 5 discrete cut angles for a given CB to bridge distance. when the distance between changes, one can increase (far) or decrease (close) the bridge distance from the CB to compensate. This can be graphed and the graph can be memorized and recalled.
For the cut angles between the 5, one can also change the bridge distance and this can be graphed and combined with the other graph.
Would this be a 2D proof?
Be well.