PrintrBot / Hanging Spool Holder

Yet another Universal Spool holder.

This one is printable in PLA on a 100mm bed. I designed it originally to stand on top of my PrintrBot 1405 Simple's Z-rods. Later I changed it to hang from the ceiling, because when it's on top of the rods it limits the Z-axis maximum.

Use an M8x140mm bolt as the axle. The Clip and Cone are from http://www.thingiverse.com/thing:767317 The Cones need a 608ZZ bearing each.

Make one mount, two legs, two cones, two clips. Make two axle holders, with one t