After seeing all the 3d printer parts organizers, I wanted one for the Qidi X3 series printers. I can't model well enough to rival the others, but I can make gridfinity modules. These were designed with FreeCAD/Ondsel. The CAD files are provided. The gridfinity plugin ( https://github.com/Stu142/FreeCAD-Gridfinity-Workbench ) for FreeCAD was used to design the parts.
The modules can be used in any gridfinity container. I use this version: https://www.printables.com/model/543553-gridfinity-storage-box-by-pred-now-parametric
The author marked this model as their own original creation.