I'm not a fan of the spool holder that comes with the Robo 3D R1+. I'm also not a fan of any of the replacement spool holders I printed out and tested. However, I am a fan of thrift stores. While cruising through one Friday, I found the perfect spool holder: a free standing, metal toilet paper stand with magazine holder. I plan on converting the magazine holder into some sort of tool box thing. Right now I'm just basking in my own genius.