I think it's worthwhile my chiming in to say that, to be honest, I had in in my head that Carthax was located to the galactic north somewhere, as opposed to the outer western fringe. That's not to say that I think either is a better placing, just that, despite keeping reasonably up-to-date with conclave stuff, I couldn't have told you with any certainty Carthax was - which is probably the same for most people.