Are you going to use those unique impulse vents (the rib-like architecture) that you had on the other thread?
Probably not. I just don't think they'd work very well with the current design.
In fact, I've been thinking about impulse engines in general and why they would have gotten so much bigger in later ship models like the Sovereign
class. I'm sure there's some rationale for it but I'm disinclined to play that game. I will probably wind up making the impulse engines just a little smaller than they are now. Not much, just a little.