Inspired by the original design, we played around with Tinkercad and learned a lot. We could not fit the fabberworld.com spools on the original design even with the 32mm version of the top part. The V9 design is far from perfect, but it fits our needs. Feel free to alter and print it.To make it enough solid, just print 80-100% infill. Print each part 1x and stick it together. Could even be glued together, or fixed with a cable tie or some tape if needed.https://tinkercad.com/things/9wMLyzReYQa-ultimaker-reel-holder-id-32mm-v9-arm-linkshttps://tinkercad.com/things/5sGP2phQ4Rv-ultimaker-reel-holder-id-32mm-v9-arm-rechtshttps://tinkercad.com/things/aFQTKdKsuxu-ultimaker-reel-holder-id-32mm-v9-top