Thanks very much to @Ezri! I definitely couldn’t make this ship fly myself (believe me, I’ve tried before), so I kinda stole the basic flying design and gave it a fresh, new look! Here are some of the improvements I made:

Warp Nacelles:
Well, they actually look like the warp nacelles now! I think the detailing on the frontal warp field nodes came out really nicely. I also added the long fins on the back of the nacelles. The nacelle pylons also got some basic reshaping, made the curvature a little more natural.

Secondary Hull (Body):
Totally reshaped it to make it resemble the movie ship; definitely not perfect, but a big improvement. Added shuttle bay doors at the back, and the deflector dish on the front. Lengthened and shaped the neck connecting the primary and secondary hulls, and added the photon torpedo bank (the little notch you can see on the bottom-front of the neck).

Primary Hull (Saucer):
Definitely the hardest section to edit; I didn’t wanna mess with it too much, cause I’d probably mess up some of the parts that actually make it fly! So, I got rid of those ugly hard corners that no one seems to have tried to fix yet; again, definitely not perfect, but I think it looks better. Did some general reshaping of the top and bottom of the hull, especially the bridge. The light blue sections and the upper and lower observation domes. Aaand, added the impulse thruster arrays (the red parts on the back).

Other Features:
Retained most of the flight capabilities! Added movie-accurate lights! Recoloring! Bumped the maximum speed to over 1,200! Took out the landing gear, so you better start flying in the air!

Again, thanks so much to @Ezri! I absolutely couldn’t have built this without you! But ah, anyone with plane-building experience, could I has a little help? When I pitch up and down, the ship is listing to the left and right, for a reason I can’t figure out… thanks!