Remix of Robo3D Top Mount Spool Holder

This remix follows other remix ideas for this design. It adds a few improvements. The base has been widened and clips have been added on the bottom for increased support and rigidity. The design also uses 38S bearings that are secured with caps designed to securely grip the inner bearing diameter, while allowing the outer race to spin freely. It also uses 1" 6-32 socket cap hex screws with washers and nylock nuts to secure the caps and bearings. The holes in the base have also been sized to be h