This parametric script is designed to generate a grid of holes with circle packing. This is ideal for storing or organizing circular things.

This model allows quite a few customizations including the size of the hole, how many columns and rows, and if there is circle packing or not!

Using The Customizer - Documentation

All values in this model are in millimeters

1. stockThickness
   The thickness (z value) of the grid
    
2. borderWidth
   The width around the holes on the edge
    
3. holeDiameter
   The diameter of the holes
    
4. holeSpacing
   The spacing between the holes
    
5. columns
   The number of columns
    
6. rows
   The number of rows

Circle Padding:

1. circlePacking
   enable or disable circle packing
    
2. allowNonCompleteCircles
   Allow extra holes for the offset row, these will be not be uncompleted holes
    
3. invertColumns
   Swap which columns are the offset row