If you're like me, received one of these printers recently... Then you may have noticed that they come with a laser cut spool holder (which isn't worth $0.02 IMHO) and with only 1 spool holder for the back. So running 2 colors at once is basically impossible straight out of the box.
So I contacted the company that manufactures them, and they sent me the .slt files for the original spool holders for the BACK of the machine. If nothing else, it can at lease plug the holes right?
Anyway, here it is. Prints 3 nuts, and one spool holder on one plate. Have fun!
EDIT 9/12/15 : Added the 3D printable files for the laser cut spool roller feet that come with the printer.
EDIT 12/2/2015 : Added the Spool alone, without the nuts.
EDIT 1/16/2016 : Added a single Nut File for those of you needing to print only one nut.
EDIT 12/15/2015 : Added the nuts alone.
I built mine with ReplicatorG & Skeinforge with these settings :
.2 Layer Height
25% Infill (Could do more if you want)