Of all the Defiant models made for BC, Nine of Nine I felt was the most accurate. I put it up against some blue prints in 3dstudio when it was first released for BC, and I'd say its roughly 92 percent accurate. But then again the Defiant model changed a number of times in DS9. This model is closest to the first physical model made for her.
There are still some shading issues I need to resolve and a massive texture overhaul. The textures are 512x512 which seems big, but when there are only 3 of them for the entire model, its quite insufficient. I'm working on some higher res versions of those 3 files because I don't wanna mess with it's existing UV map arrangement. I figured I should go as high as 2048x2048 in order to get it to look pretty when you make a flyby.