I order most of my filament from Faberdashery. It is supply only as a bundle of material rather then on a spool. The other issue is that the 100m lengths are of a different diameter then the shorter lengths.I printed out the filament spool as one of my first prints but rarely use it.Then I cam across the Hobby Clamps http://www.thingiverse.com/thing:12616 with their method of holding the clamps in place.That led me to designed these adjustable hooks that can move anywhere on the arms and then be locked into place.The square supports can be placed either way up but ideally they should be with the thicker side facing up. That means as the filament weights down on the hook it will actually push harder into the slider holding it firm.Otherwise it just needs to have the hook glued onto the support.