Flagstone Tile Pattern (Roller & Stamp)

This roller aims to create the tile pattern shown in the image on XPS foam or similar material, using 2mm edges to cut a groove. The roll itself is just over 6 inches.
The tile pattern is provided as a reference of what the roller should create.

It's the same as the Running Bond Tile Pattern (https://www.thingiverse.com/thing:3177382), but the scale is a little larger and should suit flagstones.

Updated 02/12/21: Fixed the normals
* Tile Rollers-Flagstone_Roller_211202.stl