I do know that off all the models, the next-to-last one (not Gina) had the most Holly-like appearance to the point that I confused it for her when I saw that Bullseye playing from 5241D pre-Pluto.
3 AM Eastern/Midnight Pacific on Bob's Birthday (December 12th) will be three complete cycles after the next one begins late tomorrow night, so I wouldn't be surprised if the next drop happens then, considering its about 3 1/2 months after the 300s dropped, similar to the length between Pluto #101, Pluto #201, and Pluto #301 in terms of its first airing. Like what they did last time, air about 25-35 episodes, and then after cycling back again, do a special Christmas marathon on 12/24 and/or 12/25 and air, in addition to Christmas Week 1984, air the 1982 and 1983 Christmas weeks, perhaps a total of three times before picking up again and then airing the next episodes to air around New Year's, including the first 1985 episodes.