Yes I was just made ware of al3d's model - its very nice. But I'm wary of using other peoples models as reference.
I'm mainly running off of the pics of the prop from Trek Mechanics 4 (you can see crappy small scans
here. I managed to buy a copy of the book a few months back. Its loaded with great model shots of a bunch of different trek ships). I'm also using a gob of screencaps which have proven invaluable.