Dice Tower and Tray

This is a dice tower and dice tray that fit together seamlessly. The tower can fit into the tray to roll dice, but it can also slide together to be stored in a compact fashion. There is enough room inside the tower to hold a set of 7 polyhedral dice when compacted. (This is my first published design, so I'd really appreciate any feedback you have - I want to grow as a 3D modeler)