Tinkeriffic BB Bearing 60mm Spool Spindle

Another Tinkeriffic Spool Bearing. I *know*, right?

This one is designed to fit a **60mm** spool.

I designed it to go with [this spool of PLA](http://www.amazon.com/gp/product/B00F0TK8E4/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00F0TK8E4&linkCode=as2&tag=zheng3-20), which appears to have a bore that's just wider than 60mm. There are a couple of STL's in the archive, one that's 60mm and one for the in-real-life spool I have.

This three-part solution (thirteen part