JNG, I am not sufficently tech-savvy to post links (I know it's probably pathetically easy, but I don't have one of my sarcastic teenagers here to help me), but if you look at the Sovereign article in the Starship Database section of Ex Astris Scientia, at www.ex-astris-scientia.com,
they discussed the Nemesis changes there but gave no figures on new height.
You did it
The EAS article on Sovereign
changes does indeed contain those same sketches under discussion.