3D model of juliatruchsess
The models were repaired and checked for printability.
Holds Octave Systems spools perfectly, works fine for MakerBot spools
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Created with TinkerCAD
Print it and bolt it on. I printed it on my Up! in "fast" mode with loose fill and it's plenty smooth and plenty strong. I've printed it with the round side down and with the round side up; not much difference. I do suggest printing it in a horizontal orientation.
julia@pragmaticdesigns.com