Vast The Crystal Caverns Tile Holder Cap

My component boxes for Vast: The Crystal Caverns are taller than the tile holder which results in loose tiles given enough movement. Rather than reprinting taller walls, I designed a simple cap that fits very nicely on the center cross using about a 3 degree draft. It is easy to remove while being able to hold the tiles upside down!

The tile holder design (by pmarstall): https://www.thingiverse.com/thing:2191295
My box organizers: https://www.thingiverse.com/thing:2547739