SummaryI originally made a leveling platform for my Printrbot Simple out of some 1" MDF and some T-Nuts. I attached my Printrbot to the leveling platform which gave me a surface to mount a third post to. I used this situation to make this platform spool holder attached to the two existing 8mm posts and the 3rd post that I installed. I plan to make a bracket for the 8mm rod to attach to the Printrbot base for those who don't use a leveling platform.InstructionsI used ABS with full support and raft at 230c.