Gravity Tray

simple design and very useful, radius in the tray for easy removal of items and extra stability from the captive hex nuts gravititating the situation

blog
http://ericprints.blogspot.com/

youtube
https://youtu.be/yzg5zC5YZyo

items in lego picture
http://www.thingiverse.com/make:298926
http://www.thingiverse.com/make:298756

filament used
http://www.protoparadigm.com/5DollarFilament/
http://gizmodorks.com/pla-3d-printer-filament/