Return to Dark Tower: Map Border (hidden magnets and variable arc-length)

The openSCAD file is privided.
Parameters can be set at will to generate variations on the basic design. Two base “forms” are included, one with the magnets embedded on the outside and one with magnets hidden slightly beneth the surface. Additionally the number of segments one wants the circle to be broaken up into can be specified, as well as the exact parameters of the used round magnets.
When using the “hidden-magnets” files, the magnets are later inserted from the bottom (some glue is still advised).
As my magnets are not 2mm but rather 1.7mm, I've provided both sizes.

Let me know if I messed up one of the files (or names) and you can't fix it yourself :D