Tsuro Tile Grid Corner Clips

I really like [BMLindsey](https://www.thingiverse.com/bmlindsey/about)'s excellent [grid for Tsuro](https://www.thingiverse.com/thing:3065953). However, I wanted to secure it to the edges of the board, so that it couldn't move about.

You need eight corner clips. You will then need to print four more center tiles from the original design. These will replace the corner tiles. Two of the edges of the new corner tiles will attach to the clips, and two will attach to the grid.