is the gif I promised. It's about 2mb and it fades from a dorsal view of the TOS Rom BOP to one of Miranda, and back again.
The similarities are not as great as it seemed in 3d. It now seems to me that if you want to have a trunk behind a saucer, you do it this way. Further, every other profile of the two are very dissimilar.
He also made one of a Federation "Bird of Prey" based on the Miranda hull.
This is precisely the pic I found which made me compare the two in the first place!!