I'm sorry, I don't have better screencaps than the ones from TrekCore at hand.
Star Trek Mechanics and the Star Trek Fact Files has photos of the pod filming model and diagrams, respectively. Both pics can be found at Bernd's site.
Oh, and Mr. Probert? If the creative mood strikes you when you make your painting, I for one would love to see a design for the Rigel Class U.S.S. Tolstoy (The script used "U.S.S. Chekov" but was changed to "Tolstoy" in post-production...so a Tolstoy model was never built).