Script to connect?

I have 2 python files.
Used to link the fingers (Connect wooden box)
Unfortunately it runs on Rhino 6 not as perfect as the video tutorial.
I did not detect the error. Someone try running.
Thank you

What error do you get?

The script seems to be pretty finicky, but it seems to work once you do all the steps accordingly.

At the last step, where you draw lines where the box sides intersect, it seems that you need to draw the three lines from the same start point, preventing duplicate “selections”.
Furthermore, the lines probably have to be drawn at the outer edge of two intersecting sides, and only at visible intersections. Make sure that you don’t select an edge twice!