Three-path Dice Tower

UPDATE 2016-01-18 - The newer, prettier version is here: http://www.thingiverse.com/thing:1271858. A few key improvements have been made, such as a stonework-like outer surface, and a more funnel-y top. Version 2 is definitely one version revision better than this one.

This is a dice tower based loosely on Laura's Tower in Shrewsbury. I've included an .iges file as well.

All the components are designed to print within the M3D build volume, and are designed to be connected using disc magnets.

Edit 2015-10-21 - I realized that d20's escaped the side stair railings about 20% of the time. I uploaded "high wall" versions of the stairs. With 10mm extra height, it should keep those dice going down the stairs properly.