[Closed] spline IK control and Path contraint script

I’m having a little difficulty figuring something out, and part of me thinks it’s not even possible to do so.

Problem:
spline01 has 4 points, and a spline_IK_control applied with 4 point helper in the scene, create a 5th point helper that has a path constraint to spline01 while keeping it between 2 control points

X—X——-X———————–X
1 2 ^ 3 4
5

I want to make a point helper between point 2 and 3, however it is not always 50%

Step one: get the position of point 2 and 3

Step two: average positions of point 2 and 3 together

Step three: create a new point at the averaged position

Step four: apply a path constrain to the new point while maintaining the offset from 0%

The main issue is that I can set the percent of the 5th point helper to 50%, but if point helpers 2 and 3 are both below 50% then point helper 5 should be between points 2 and 3, not at 50%.