Unfortunately this requires, for RP purposes, that Berlin become autonomous or functionably independent. Otherwise, Fomee will simply override anything that this Berlin does.
Why do I say this? Because if I were Fomee, that would be definitely what I would do.
No, the New Prussia was Catholic
the HRE was Catholic
i do know how to deal
my deal is
You get NO autonomy and are annexed into the State of Saxony-Westphalia.
Ya trying to be independent like you got to be
Catholic Prussia? AHHHHHH
Well I guess this is way better than a Protestant HRE, but eh... Y'know, you could've made things easier and just said that Austria unified everything.