Overall, fit is really good. Cockpit is bland, I think KH are relying on you to use the decals to detail it up. Odd that you don't get any bombs with it, given it's most common loadout seems to be 2xGBU-12 on the centre line.
I'm enjoying that a lot of parts are single piece, like the pylons and tail (aside from the top bit).
With the exhaust, I flooded the joints with liquid glue and then pressed as hard as possible. Once the glue dried, I just had to remove the excess to retain the ribs.
The instructions suck though!