Cube Storage Organizer 6-way hub

thingiverse

This is a better hub for those cheap wire modular organizers that can be found on Amazon. The joints included in the box are flat on one side, meaning that you cannot build any shape you want. This model solves that. In your slicer be sure to rotate the model so that one of the triangular faces touches the buildplate. See the screenshot for how to do this. Turn on Supports, but only allow support to be "touching buildplate."