SummarySimple and easy-to-print modular wall-mount spool holder.InstructionsInspiration for innovation can happen in the strangest of places. In this case, I was in the middle of my ordinary morning routine, when I looked to my right at a standard toilet paper holder. 3 hours later this model was completed in CAD - this design is a remix of almost every toilet paper holder used in North America. Time and time again, the toilet has been that fruitful place where many a light bulb has gone off in my mind. This modular spool holder is designed to be used with any 1.75mm Hatchbox brand spool (or any 8" diameter spool of the same width). Spool Example: http://www.amazon.com/Hatchbox-1-75mm-3D-Printer-Filament/dp/B00J0ECR5I/ref=sr_1_1?ie=UTF8&qid=1442862294&sr=8-1&keywords=hatchbox+pla The assembly consists of three printable parts: spoolbracket-RIGHT.stl (Right Bracket) spoolbracket-LEFT.stl (Left Bracket) spoolbracket-base.stl (Wall-Mount Base) I have also included the .STP CAD file for those who would like to modify and edit the 3D data in a CAD software (spool-holder-assy.stp). Assembly Notes: The parts are held together with 6x 14mm M3 screws. I always get my stainless steel button head screws from Mcmaster-Carr. Here's a link to order them: http://www.mcmaster.com/#92095a168/=z1d7m5 The 6x mounting holes in the base are sized for M3 tapping (they print at 2.5mm dia.). Once tapped, the holes accept M3 screws perfectly. If you don't have a drill and tap set, I highly recommend that you do, and you can get one here: http://www.harborfreight.com/metric-drill-tap-deburr-bit-set-95529.html. The bits both drill and tap the hole to the proper size in one simple operation. The larger 3 wall mounting holes in the base are designed to be finish-drilled with a 4.5mm bit (or equivalent). 1" or 3/4" PVC can be used as the reel pin. I used 3/4" PVC cut to 3.75 inches and it works perfectly. All 3 parts on the finished spool holder shown in the images were done with 18% infill and black Hatchbox PLA. They printed up wonderfully.