Already mentioned it somewhere, that in addition to the theory that Signs but not rulerships blend at the cusps, as one Sign transitions into the next, there's the Orb theory. That's where the designated Orb of a Sign-ruler extends past the boundaries and activates the adjacent Sign. So, regarding how close the tropical Age Window, or, more graphically appealing, the Age Trident, is to reaching Aquarius, Aquarian qualities are already in effect during this tropical Age of Capricorn. Unfortunately, Saturn, as the Age-sign ruler, has control of them. For me, this explains a lot, especially the misuse of high technology to enslave rather than liberate.