Universal Adjustable Spool Holder

Universal spool holder for Prusa i3, also may fit other models.

Main advantage: spool is placed on moving rollers, which can be easily adjusted to any spool width - spool with any diameter and width can be placed, time for adjustment is couple of seconds.

Parts needed:
1. 2 8mm rods
2. Many 608 bearings (depends on how many rollers you want to install).

You will need to print two main supports, that should be screwed to printer frame. My printer (HicTop) had wires on the left side, so i've added two versions of main support, a normal one, and with cut-off for wires.

slider_end are not moving "sliders" to be put on the ends of the rod, like stoppers. You can make as many sliders as you want, depending on the lenght of rods you have. My version has 4 sliders, and 2 "end sliders", which allows me to put up to 3 spool at time.

P.S. I've inclded SolidWorks sources, for all version, but normally you should use the latest version of parts

P.S.S The wheel for b