Closed off the bottom and made the center solid for faster printing and no infill. Picture is 100% printed in Makergeeks PETG, 0.2mm layer height and 0% infill. Cut printing time in half for me. Credit to DrLex for the original design - http://www.thingiverse.com/thing:1682665.

Print Settings

Printer:

Wanhao I3

Rafts:

Supports:

No

Resolution:

Infill:

0%