I have made Improvements to this bracket see http://www.thingiverse.com/thing:1000680 I designed this bracket for my new cabinet to hold a 19mm round wardrobe pole from a DIY store, I printed it solid and include a second round ridge under the main collar to increase strength. I'm not an engineer and not sure its exact load capacity if anyone has suggestions or advice who is an engineer that would be great?, I include the openScad file I created so feel free to modify for your own use, or check the code out openScad is brilliant and easy for stuff like this. I did also need to design spool spinners to go with this pole. Included is the spinner I use for prima ink, with and without holes. OpenScad files included so you can customise to your own size spools.I printed 200 microns (0.2) 100% fill 3 shells, no support or raft needed.