While I'm sure you guys have done your homework, I'd just like to warn against trusting on-screen measurements too much. People do invest a lot of time and effort into measuring space ships based on perspective shots from unknown camera distances, and sometimes the arguments can sounds convincing. However, the example of the Battlestar Valkyrie serves just how unreliable these methods can be; until they've shown more of the ship in "The Plan", fans used shots from Razor and Hero to measure the ship, using similar methods to the ones described with Home One. None of them got even close - some of the measurements were hilariously wrong. We're talking error margins over 100% here. Where am I going with this? Don't lose too much sleep over on-screen measurements and just go with what makes sense / works best in the game. Measuring screencaps is a notoriously unreliable method; the ship in the shot is typically compared against something else, and that something else just needs to be at a slightly different angle (to the point where it's not obvious on the shot) to the reference object to get the measurements wrong by a few hundred meters easily, when we're talking these kinds of scales. Similarly, you only need to get the X:Y:Z proportions of the ship off by 1-2% to get dramatic differences in ratios of hangar height / ship length.