This spool holder is designed for a C/D-bot (http://www.thingiverse.com/thing:500041, http://www.thingiverse.com/thing:1001065) to mount the spool at the top rear of the printer for direct drive extruders. Can be configured for single or multiple spools.

Printed Parts: 1x Left Frame 1x Right Frame 2 x Bearing spacers (per spool) 2 x Holder retainers (per spool, 2 sizes 26-38mm and 50-64mm)

Extra parts required: 4x M8 Nuts (+2 extra per extra spool) 130mm M8 threaded rod (320mm for 2 spools etc) - any length will do really. 2 x 608ZZ bearings (per spool) 4x M5 t-nuts (to mount to 2040 T or V rail) 4x M5x10 socket head bolts (to mount to 2040 T or V rail)

Need it printed out? Then try this guy out, he's a great guy ;) https://www.3dhubs.com/service/Geoffs-3D-Printing