Hi Michael,
I dont want to beat ahorse, but had a question here. Perhaps I am misunderstanding something with the bisector. The script is creating a mid to mid point od the 2 lines at whatever length they are. The bisector "should be the ANGLE"??? With my initial method of using a tangent arc and a line with perp snap, bisects the angle. With the script, it is more of a mid 2 mid line generation.

In this file, the red line is MoI's mid to mid, and the other is the angle bisection...

Have I missed something about what was requested or the desired result. Thanks.