Reel holder - Print 2 tubes, 4 flanges, 2 stands. 19mm bearing press into the tubes, and then use a Bolt to mount the bearing to the stand. Everything presses together nicely. If necessary, you can provide a little heat to the PLA to squeeze the bearings into place. I put electrical tape around the tubes to give the reel a little bit of traction. I also added some small velcro pads to the bottom of the feet to keep the reel holder secure in place but also give me the option to take it off and move it if necessary.
Optional Guide Pulley - Print guide pulley and pulley mount. 16mm bearings and a 3" #10 bolt is used to mount the guide pulley to the pulley mount. Attach onto aluminum frame where needed.