Did we ever find an independent reference for that model of the Enterprise in "The Ensigns of Command" being cg, other than one web article written by the person that originally posted that in another thread on this board?
No we did not. In fact, I'm pretty sure the last posts in that thread pretty much nailed that it was NOT CG.
As for wirework, it was often used for lightweight models. A series of wires creates a surprisingly rigid suspension system for animation of miniatures.
Even THE ABYSS and HUNT FOR RED OCTOBER often used wire rig systems for small and very large submarine miniatures, in addition to the pole mounted stuff.