Customizable Heart-Shaped Compartmentalized Box

I've seen lovely small heart-shaped boxes here, like http://www.thingiverse.com/thing:42309, and decided to try my hand at designing my own to use Customizer.

The lid is friction-fit. When I tested the design, I had to sand down the edges of the lid some for it to snap into place. This script has an option to shrink the lid by 1-2%, which will (with any luck) still fit snugly but without as much elbow grease. This has not been tested, though.

The script includes a module to create simple