Customizable Flip Flop

This is a flip flop, with anchors to fix the strings and a perforated sole, ideal to keep in your sport bag or to bring with you on lightweight travelling.
You can change the thickness and modify the shape to match exactly your foot and preferences.
To do that is not too complicated...
First you have to put a sheet of paper under your foot and with a pencil draw the contour of it and mark a point between your big tow and the second toe where the strings will attach.
You can select to show the points as in the picture attached, just set the Edit_mode parameter to 3.
Draw a horizontal line and a vertical one starting from P1. Now draw 3 horizontal lines (it is not important the distance between them, just space them roughly equal).
You have now your reference points and you can fill in the parameters of the customizer, either online or if you downloaded the file in Openscad customizer, or just change them in the file itself if your openscad version do not have the customizer.
Now