Dice Throwing Tray

I usually use a box lid to throw my dice into, to keep them on the table, decided to make something purpose built to take its place. This is the first design, I'll probably still mess with it a bit, but so far I like the general idea.

The D20 graphic on the bottom plate comes from: coveiro's 'Keychain of d20 and Cthulhu'
http://www.thingiverse.com/thing:386853