I didn't even know such a thing existed until I stumbled across this while doing a print for my sister. I was using a MakerGeeks transitional spool and I needed a good sized print to get to the inner color on the spool and decided I would use this print. Its a super awesome print, no supports needed - but I found the dice had a difficult time staying within the walls of the courtyard. I doubled the height of the courtyard wall and it helps keep the dice contained just a little better, trade off is a loss of visibility of the dice numbers from certain perspectives. I'm so excited how well the print turned out I want to make some other dice tower designs!
All the credit on this design to adamw4 - really cool design.