just some resources and macros for designing junk in FreeCAD.
there are a handful of post-processors that ship by default with FreeCAD. on debian they can be found here (assuming an apt install):
/usr/share/freecad/Mod/Path/PathScripts/post/
you can copy any file and modify it to get customized behavior.
symlink the post-processor of interest to the ~/.FreeCAD/Macro/
directory