Rotating 11 space R8 Collet Rack.
Printed the 11 collet model. I used Hatchbox PLA, .2 layer height. Nowhere near 60% infill, simply isn't needed. I used 25% (even that was overkill) and the part is very strong. The only thing I would change, is to use a 1/4 x 5/8 bearing (R4) instead of the 1/4 x 3/4 (R4A). Why? Every hardware and bearing store has an R4. Although the R4A is commonly used for router bit follower bearings, it is more difficult to find. Overall nice design. Thanks!
Printed on my heavily modified Tevo Black Widow which has been running trouble free now for 4 years.