Seeing Syd Mead lecture in SF was an incredibly profound lesson on design. During the Q&A I asked him how far he went on a design to make it technically believable. His advice was ‘to design with the story in mind and stay consistent with it’. Hence I learned that the Sulacco [sic] from Aliens is essentially a massive gun in space with a big nuclear reactor at one end which beautifully fits the theme of space marines exploring a planet infested with deadly hostile aliens. That answer freed me obsessing over minutiae that diverges story-wise, and focus on the broad strokes that propel the story. The addition of ensuing consistent minutiae would give it richness.