In regard to his notion of the design being a Federation/Vulcan hybrid, Probert has later specified, "The back-story in my mind at the time was that the shuttlecraft itself was a Starfleet design, while the warp sled would be contributed through the efforts of the Vulcan Space Authorities." [4] At the time, Probert even envisioned the shuttle part coming in two different sizes. A design sketch of 3 May 1979 specified a smaller forty feet "Starfleet-Standard-Shuttle" and a nearly one and a half larger "Starfleet-Long range-Shuttle" as the one to be attached to the warp sled. [5] Probert explained, "When I was asked for ideas on the Enterprise cargo decks, part of those ideas included new hanger deck spaces where one would logically expect to see shuttlecraft. Since the larger long-range shu