Why

• I wanted to make a spool holder that wasn't fiddly - I wanted it to be stout, and universal (or at least agnostic to what particular diameter and width the spools were).  
• Most of the Cardboard Spools I use are Overture brand, and I wanted to make sure that I worked out a good way to adapt them to work with my new Spool Mount as well (more on that further down) 

Features

• Easy to print, easy to assemble
• Easy to load and unload spools, still with one hand
• Holds spool on one side only, so you can use .5, 1, 2, even 3kg spools
• Can be mounted inside our outside enclosure
• Lightweight, but sturdy, not visually heavy
• Mini Spool Holder, this can be used instead of the Standard Spool Holder to accommodate mini (500g) Spools.  - but also works with 1 KG Spools.
• The Hybrid Stacked Spool Holder model is a combined piece that integrates the Catch Mount and a Spool Holder so you can print more efficiently all the pieces to stack 2, 3, 4, or however many spools you want vertically in your spools.

Print Instructions

• Use Default Prusa Slicer 0.30mm Draft Print Settings
• Filament : PLA, PETG, ASA
• Brim : only needed on the Sliding Catch
• Infill : Triangles 10-15%
• Perimeters : 3, Top/Bottoms: 3
• All parts have been designed with an intended side that it is printed on to reduce necessary support material.

Non-Printed Parts (for 1 Standard configuration)

• (5) 608 bearings
• (5) M2.5x16 screws
• (5) Mounting Fasteners
  • M4/M5 screws and nuts to attach to enclosure wall
  • Drywall / Construction Screws if mounting to wall

Assembly Instructions

Spool Holder

• Add bearings onto Spool Holder
• Add a Bearing Cap to each of those bearings
• Attach the Bearing Caps with a M2.5x16 screws

Catch Mount

• Add the 2 bearings to the Catch Mount
• Place the Spool Catch Bearing Spacers on top of the bearings
• Attach with M2.5x16 screws

Sliding Catch

• (NOTE*) The Sliding Catch needs to be mounted to your enclosure, or wall before the final fitment of the bearing on the Sliding Catch.
• Place bearing onto the end of the Sliding Catch
• Add the Catch Bearing Cap
• Attach with a M2.5x16 screw

Installation

• Mock up in your enclosure where you plan to place the Spool Holder
• Mark the 3 mounting screw holes on the Spool Holder
• Measure and mark a spot directly up 8 ½" from the center screw hole of the Spool Holder to mark the top hole of the Catch Mount
• Measure and mark a spot for the bottom hole for the catch mount  down 1 1/8” from the top hole
• Screw in assembled Spool Holder
• Screw in the partially assembled Catch Mount (See pictures to for orientation, thicker side is on the bottom)
• Slide the Sliding Catch onto the Catch Mount from the top downward
• Attach the Bearing and Sliding Catch End Cap with M2.5x16 screw
• Done!

Other Tips

• Due to the weight of a full spool, cardboard spools may develop flat spots, but I have found that printing the Polymaker Cardboard Spool adapter to put a plastic ring around the outer edge mitigates this issue entirely. 
• My intended use was to mount 1 inside my enclosure on either side of my printer, and additionally to mount multiple stacked on the wall next to my other printer so that I can stage ahead of time for filament changes, as well as to support multiple spools for use with MMU3 or other multi-material configurations.