SummaryThis is a remix of http://www.thingiverse.com/thing:409100. This assumes you have a modified XYZprinter that can accept spools other than the original cartridge. The original spool hanger by Ranh316 was too small for the spools I use, so I started over using his basic premise. The spools that I use have an inside diameter of 59mm. These are 2LB spools that I order from eBay. The hanger was beefed up to support the additional weight. Bearings and end caps for the spool were created to give the spool less resistance and give the spool a centered area from which to rotate instead of dragging the spool over a rounded surface. A hex recess was added to the hanger base to fit a 4" 1/4x20 bolt which then goes thru two bearing blocks that grip the spool and provide a smooth spool rotation. A small cutout is required in the top cover of the printer to keep the filament from slipping under the spool. I could have included a filament retainer in the print, but I had binding problems with the original version and found that an opening in the lid works better. Thread the filament from the right side of the spool as shown in the photo. Additional parts you will need are a 4" 1/4x20 hex head bolt. Two 1/4x20 nuts, optional washers. Two 5/8 OD 1/4 ID bearings. Note: Bearings are a press fit. Use a vice to press them in place. You will need to print two copies of the bearing block. InstructionsThis will require supports since there is an overhang present. Print two copies of the bearing block. Bearings are pressed into place with a bearing press or vice as this is made to be have a very tight fit. You should cut a small rectangle in the lid of your printer to ensure the filament does not ride under the spool. Insert the 1/4x20 hex head 4" bolt into the recessed area of the spool holder and secure with one 1/4x20 nut. Place one bearing block on the bolt and then put the filament spool in place, securing with the other bearing block and one more nut. Tighten securely. Optionally, you might want to use a wing nut on the outside end cap rather than a nut. Would make it easier to swap spools.