Thumbtack Gridfinity Shelf

This a is small Gridfinity shelf that can be hooked up to a corkboard or wall using 2 regular thumbtacks. 

I started with a 1x3 weighted baseplate, cut off the bottom and filled the gap, then added some brackets on the sides so the shelf would sit flush with the corkboard.

Note: My corkboard is cheap, it's thin cork with a layer of cardboard behind it. So the weight limit here isn't very high. I use it to hold pin backs and button pins. 

Designed in Tinkercad. 

Cut and filled the bottom of the weighted baseplate. Added brackets and holes for thumbtacks.