What is the advantage of losing all that internal space?For all the talk against spherical primary hulls, for those of us looking for a somewhat unique primary hull design while retaining effectiveness, I'd champion a torus-style saucer of a primary hull. It's not the standard saucer or half-saucer, and it'd likely be more focused on the specialized aspects of the biosciences ship, but it would still largely retain its effective lines of sight for any tactical weapons emplacements.