Some Spool Boxes i designed because there weren't any available for angles of 60° or smaller.
For angels betwen 60° and 40° i rounded the corner opposite of the axis.
For angels lower than that a drawer was made, wich should works at any angle.
The stl-files are made for anycubic spools, for other types edit the FreeCad file.
For some Reason the online Customizer breaks for small angles (<90°) download the scad-file and edit it in OpenSCAD for this.