Actually used the screwless version: http://www.thingiverse.com/thing:487294 but felt I needed to leave a note here too. Very cool design, it's quite the attention grabber when motorized. See video: https://youtu.be/wb3itmDG7H4
Dremel Idea Builder
Had to add helper discs to all pieces to get enough stick to bed. White pieces printed badly because of cheap filament I wasn't familiar with yet.