I really liked the look of this spool holder and printed it out right away.
Something that I noticed upon installation was the slot to load the spool axle was angled rearward and a bit shallow for my liking. So I rotated that feature to vertical and lowered the bottom of the slot a couple of mm.
Also I changed up the chamfers to radii and added a locator to lock against the upper frame to take some of the load of the acrylic controller cover.
Finally I added bosses on the back side to accept a newly designed brace. This brace stabilizes one side with the other. A bit of sloppiness between the two is what I am experiencing. The brace keeps the holders apart by 100mm to the inside face.
This is a remix of a remix. The original is here https://www.thingiverse.com/thing:2162266
3 wall layers
6 top and bottom layers
225C hot end
60C print bed
Assembly is a nice pressure fit with .1mm clearance designed between parts. Mine required a pair of pliers to press the joints together.
Edit 4-4-2017. I removed the brace stl due to it being too wide. Should have been 100mm between faces and not 150. Will repost modified brace.
Edit 4-5-2017. New brace_a stl was uploaded. All parts clear spool diameters and ribbon connector on the back of the controller display.
This has become part of a whole filament holding no-tool system. I have printed this spool holder http://www.thingiverse.com/thing:2112075/#files and combined it with this axle adapter http://www.thingiverse.com/thing:2228643