Parametric storage for gaming miniatures

*4/13/21: This is an initial proof-of-concept draft that I will be evolving to improve usability, elegance, and utility. I am an OpenSCAD novice, so input is very much appreciated.*

This is a simple OpenScad module for creating storage wells for board gaming miniatures. It can be used as-is for generating a storage box and lid for storing up to 12 miniatures, or the mini_well and mini_wedge function can be used in other OpenScad projects to create customized storage wells.

The shape of a well is defined using three four-sided "layer" shapes, each of which defines the shape of the well at a given plane. The points of each layer are defined starting in the lower left corner, then moving clockwise.

For example, let's say that you define your layers as follows:

layer1 = [[10,0,0],[10,6,0],[30,6,0],[30,0,0]];
layer2 = [[0,0,5],[0,45,5],[33,45,5],[33,0,5]];
layer3 = [[0,0,10],[0,55,10],[33,55,10],[33,0,10]];

* The bottom layer (layer 1) is a rectangle positioned 10mm from