This is designed in order to facilitate the creation and hanging of mosaics.
It was specifically designed to fit the tiles from the 100hex project https://www.thingiverse.com/thing:2477471

The Holder.stl file has a cutout in the back which is used to fit a nail and hang it on the wall.
All the other panels connect together, as such a whole mosaic can be hanged easily, without glue or tape and with minimal damage to the wall (just 2 nails).

There is a 0.2mm gap between the tile and the panel, it should be a friction fit.
However, if your printer is extremely well tuned you might find you need to scale the tile by a tiny amount to ensure it stays secure.
The gap between the grooves and the tabs is 0.4mm as I found 0.2mm was too tight for assembly.

IMPORTANT : There are 2 type of panels, the ones starting with Edge_* have the edge at the top, the ones starting with Corner_* have the corner at the top (check the pictures for a better understanding)

Leave a comment if you have any suggestions or questions.