Multi-Spool / Multi-Size Spool Holder (Ver. 3)

Here's a re-load of my previous spool holder which attaches to the openings for the handles on the side of the Flash Forge Creator X.

Original write-up at http://www.thingiverse.com/thing:321558 explains what parts you need to purchase BUT do NOT buy those same sized bearings! You need to buy 30mm outer diameter by 10mm inner diameter by 9mm width bearings instead

Improvements:

1 - New 30mm o.d. bearings integrate into each hub so each hub spins individually so using 1 spool on the new holder doesn't spin the other spools
2 - Revised the "hub" design for faster printing by printing only each end (leaving out a lot of plastic that is not needed, I adopted a "clam-shell" type design for each (now, 2 piece) hub. You simply put a bearing into each half, and put each half into opposite sides of the spool
3 - Spherical Bar End Caps have deeper receiver so there is less chance the bar would separate
4 - The Square Tubing "Seats", (see pictures 2&3) have received "Spacer Ridges