Universal Spool Holder

Update 01 Feb 2017 - Uploaded a longer screw - 120mm - as per request. With my printer Geeetech supplied a spool holder of Acrylic and PVC pipe. However the pipe was too thin for the hole in the spools and the extruder had to tug hard to feed. Looked around and finally found this which of course was not exactly what I needed. Imported the threaded rod into Sketchup, scaled it and cut a hole thru the threaded rod to allow a hole of 20mm in the middle for the PVC pipe to pass thru. Also scaled the Cone to accommodate the now larger diameter rod. Fits perfectly and my extruder is pleased.