Since i don't want to call the stumps off 20x20 profile that Flsun calls spoolholders completely useless i made sleeves for them to hold my 1kg spools. I decided i want them on both sides of the cube since thats the place were my new extruders are going to be.
(when they ever find their way to me that is)
Also i don't want them to interfere with my Z carriage. Added a standalone version wich i am using myself.