Refer for more info:
https://www.multiboard.io/

Or at thangs.com
https://thangs.com/designer/Keep%20Making/3d-model/8x8%20Multiboard%20Core%20Tile-974214

Usage:

// Create a common (core) tile 3 cells width, and 2 cells in heightmultiboard_common(3, 2);// Create a side tile tile 3 cells width, and 2 cells in height. Tooth are on// the right sidemultiboard_side(3, 2);// Create a corner 3 by 2 tilemultiboard_side(3, 2);

If you use it, you'll please me if you let me know.

Refer to my github for the latest version: https://github.com/shaggyone/multiboard-parametric

NOTE: Thingiverse shows "ERROR: Parser error in line 55: syntax error Can't parse file" without any details. My best guess is that it uses obsolete openscad syntax. Just use multiboard_parametric.scad in local openscad and you'll get what you need.