Since i'm about to receive my Pallete2 i need 4 spool holders in order to make effective use of it. I searched for something to my liking but i couldn't find anything that fully met my needs.

I want to place the spool holders next to each other on a base.
I want to be able to use a variety of spools with different inner diameters without having to use different stuff to accommodate for that.
I want to use the spool holder such that it can be placed either next to the printer or on a lower level below the printer, without having to worry that the spool detaches from the holder.
I want to be able to easily replace an empty spool, just by pulling it out of the holder, replace the empty spool with a full one and putting it back in.
And lastly, i want the spool holder to be fully 3d printed without the need for any additional material.

I came up with this design. It can accommodate for spools with an inner diameter of 35mm up to 55mm and outer diameter of 200mm up to 355mm. Spool width can be max. 110mm. It is designed to easily hold spools up to 4kg. I can imagine that it can hold heavier spools, it is however tested with 4kg spools.

The design consists of 7 parts that can all be printed. Assembly of the spool holder is easy. Just connect the base bars with the two frame parts and use a little glue.
The clamps are screwed on the screw and tighten the spool making sure the spool is concentric with the screw.
The spool holder can be attached onto a board with some wood screws. Adding the spool to the holder is simply a matter of pushing it into the frame. Replacing a spool means pulling the spool out of the frame, unscrewing the clamp(s), replacing the spool and tighten it again using the clamps.

If you decide to make this thing, please post a 'Make'.

EDIT (2020-02-19):
I've added 3 more files (Screw Left.stl, Screw Right.stl and Screw Pin.stl) for people having trouble printing the screw upright in one go. Instead of using Screw_tv.stl you can print these three files and mount them together afterwards. Place both screw parts with the bigger size on your build plate. Just use some CA glue to glue all three parts together. The pin can only be mounted in one way. This ensures that the threads of the screw will be okay after mounting. The only issue is that you might want to use some sanding paper if there is an elephant foot on the bottom of the prints.