I've seen a video on youtube by someone who had an Earth Destroyer with the Rotating Section working, along with the weapons and jumpgate...but they cancelled further work since he wasn't able to get help.
Shame really...
I'd love to see a workable B5 mod To include the 6 major races:
Earth Alliance
Minbari
Centauri
Narn
Shadows
Vorlons
...But to be honest, i'd probably play as the Vorlons every time, lol.