I found this rendering in an Oregon State engineering textbook excerpt – a greyscale version, but with a taller crop showing the street level, and with more visible details than the small version I found previously:
It seems like this one has greatly picked up pace again. I suspect the transition between the 3rd and 4th tier was just a lot of work (in addition to it just being mech now but for the 2 conference floors). We’ve reached past the halfway point of the 4th tier now at some 1175’. Maybe I will try to update my progress timeline in a few days/over the weekend.