More Archimedean Pencil Holders

Here are 5 pencil holders based on the Archimedean solids.

They are constructed from just two elements, hypocycloids and spheres.
Stl files are:

icosidodecahedron.stl
truncated_dodecahedron.stl
truncated_icosahedron.stl
rhombicosidodecahedron.stl and
truncated_icosidodecahedron.stl.

OpenSCAD code is included.