Round Coffee Filter Holder

I wanted a coffee filter holder that would hold round coffee filters but could only find ones that I assume are cone-shaped and stored flat. I hope you like it. I have included the FreeCAD files used to create it. You can modify the size by modifying the numbers in the FreeCAD spreadsheet.

Still new to the hobby so I have to figure out some of the problems I had. You can see on the print I have these ridges which are layers that printed a little bigger for some reason. I am assuming this is some slicing setting.