Printed this on a Lulzbot TAZ5 using HIPS. I used the HIPS medium quality settings from the Lulzbot website, print took about 2.5 hours.
Getting it moving took another 3-4 hours:
- cut with an Xacto knife between inner/outer rims and every ball
- went between each pair of balls with the knife
- moved a lot back and forth by hand (maybe you can skip this, it's painful)
- used a silicone based lubricant
The lubricant is magic, all of a sudden it is moving well. Great design!