Looking great! You did a nice job with the gun doors, I've built this kit twice and couldn't get them to fit as well as yours.
Incidentally, my dad says the gun doors on this kit are not like the ones on the P-51's he worked on in the PA ANG. If I recall correctly, he said they would load with the ammo box, not belts, so they would not open the long panel. He also said the guns were not cocked until the plane was on the runway positioned for takeoff.
And I am wrong! Just had dinner with my parents, asked my dad about the gun bay doors. He said the doors are the same, but in doing his job he never had to open the long panel. Another crew would load the ammo belts, his job was to feed the first round and *** the guns just prior to take off. So they probably wouldn't have both panels open at the same time, but that's how I did mine!
Your painting turned out fantastic!! Very inspiring, gonna have to try it on the checkered tail and prop hub of the p-47 currently occupying the bench.