Made using a mesh generated from sethmoser's script (http://www.thingiverse.com/thing:304177). This is 70x70x5 with a side length of 4 and 7 turns. I needed to play with Cura settings to get the slicing to work, and to get a good base to print on. With standard setting, the slicing doesn't work and you get only a few fragments. The trick is to set the shell thickness of 0.38, for a 0.4mm nozzle. The raft settings used an air gap of 0.3, and the raft then peels off easily.
Printed at 60 mm/s using nGen, temperature 235/85, onto PrintBite