Wanhao D6 Filament Spool Holder (No support needed)

Simple filament spool holder for Wanhao D6 3D printer. Place the part upright (thread part on top) to print without any support material. Works well for larger spools.

Update 04/12/2018
The original file works fine with PETG, but the part failed near the thread when printed in PLA with 20% infill. I increased the thickness around the thread region.