Quick Change Filament Spool Holder

This is a thing in progress, and i will be adding attachments on a regular basis. remixes are welcome, i am open to all requests. i am currently working on interchangeable flat top shelf brackets and a spool shelf for large quantities of filament that are not being used. the cylinders that fit into the spools can be printed out of pretty much anything at 100% infill. i figured it would be a great way to use up random nearly finished spools of filament. Ive been using these for my ender 3 for several months without issue, i have not tested anything heavier than a 1kg spool in this yet, however that will be coming soon.

Attachments:

Flat Top Shelf/Rod Holder: http://www.thingiverse.com/thing:3759974 this can be used to hold a simple flat top shelf or a dowel can be placed though the ends of the bracket to hold a large quantity of spools.