Yeah, I'd like to see that too.
I like Shaw making the Phase II look more back to TOS. Most Phase II efforts point more to TMP.
He has made the refit secondary hull even more streamlined in giving the shuttlebay the TOS treatment. You might want to include the sketch you made at fed-ref and hobbytalk (I think) of the saucer hull here too.
Now I seem to remember one of Jeffries TMP sketches showing what looked to be a small impulse deck at the aft base of the saucer support dorsal.
Now you are making a pho-torp tube that can be added on the front or left off at one's discretion. I wonder if you could test mount it on the back too.
I remember a Daedalus model that had a similar neck mount impulse exhaust.