Lint, your connie looks good, but there are a few things that need to be addressed:
1) Some of the textures on the bottom of the saucer and on the rim look off
2) The colors of the Buzzards should be reversed, the black should be small and rotating, not the red
3) The dome deck right below the bridge is a little mis-shapen
4) The impulse engines don't glow right, they're too wide rectangular.
5) The warp drive nacelles need to be brought up a little higher
6) The cowlings on the rear end of the nacelles are wrong. I don't know how to explain it, but look at the studio model and you'll see.
7) The bridge...I'm sorry, but the shape of it doesn't match the shape of the ship that you're doing. You're doing the regular run Enterprise, but the Bridge is shaped more like the "Cage" bridge module.
I'm not trying to be rude, I'm just trying to help you make the absolute best TOS Enterprise that you can make, as I know you can do it. Honestly, the best resources for you would be screenshots of the Enterprise from the remastered show as that model was created from scans of the studio model, and pictures of the model itself from the Smithsonian, assuming it still has an honored place there.