Fiberlogy spool conversion screw [REMIX FROM THINGIVERSE]

The problem with the fiberlogy spool is that it is too wide to accept the refills. Another user has posted a spacer that will keep the filament squeezed ( https://www.printables.com/model/110743-fiberlogy-masterspool-spacer-add-on ), but my version uses less filament and is in my opinion more elegant. 

Follow these instructions: https://www.thingiverse.com/thing:3642791 [Original model]

To allow this model to fit, cut off 7mm extra from both sides.

Scale to 1000% if it's too small, and 25% infill should be enough. I think you can go lower though, 10% maybe, haven't tested.