Prusa Spool Holder

The old style printed spool holder would sag under the weight of a full spool, and the nifty new injection molded Mk3S spool holder doesn't work on my older Mk 3 (the frame seems to be slightly thicker, and the top clip broke when I tried to install). So I took the old printed spool holder and hacked it up so I could use some 21mm OD GRP pipe I had lying about (if you're curious, it's pipe from VEX Robotics Competition field elements). Works great, definitely more stable, and allows you to mount more than one filament spool with the right length pipe. The socket for the pipe is 22mm.