Rhombitruncated Cubeoctahedron with Tunnels

Here are 5 examples of the regular faced toroidal polyhedra of Bonnie Stewart from his book "Adventures Among the Toroids." The outer structure is a rhombitruncated cubeoctahedron. The internal cavity is a rhombicuboctahedron. Various numbers of square cupolas are removed to connect the two and create toroidal polyhedra. There are other variations of this that I hope to post in the near future.