Printrbot Simple Built-in Spool Holder

The Printrbot Simple is a great printer, but lacks one key feature: a spool holder. If you're like me and don't want to carry around a separate spool holder, this should do the trick. I will upload photos once I finish printing. UPDATE: I printed out both parts, part 2 came out great and fits perfectly onto part 1. Part 1, however, did not fit so well onto the metal rods. I updated the model, now called "part 1 revised", to allow for 2mm more space and sturdier tubes. UPDATE: the revised p