Spinward Flow
SOC-14 5K
In the original LBB S3 and Fifth Frontier War board game, Kinorb/Regina had a UWP of A663659 5 and was a Rich, Non-industrial world.of any TL (even Kinorb A663659-8).
It's CT Errata that came along and later revised the tech level upwards from 5 to 8 for the world, a +3TL bump (for reasons never adequately explained), along with myriad other retcon changes that violate the continuity of multiple CT publications.
It's one of the reasons why I'd like to be able to create my own "LBB3 Repaired" version of the Spinward Marches for use with Travellermap. It's been more than a week already and @tjoneslo hasn't responded to his own inquiry regarding alternative versions of sector maps yet, which is mildly frustrating.
Anyway ... the point that @AnotherDilbert is making is a valid one. In the "early writing" of CT (LBB1-3) starship construction was "relatively tech level insensitive" since only the drives and computers "cared" about tech levels, while everything else was just "assumed" to be available given a type A starport. LBB5.80 changed that paradigm in important ways that we've been using and relying on ever since as a "better default" for how to think about the question of how much UWP matters (if at all, beyond the type A/B starport) in construction and annual overhaul maintenance.