The only additional bit of detailing I felt I needed to do was on the airbrakes. The brakes didn’t really fit well in the closed position – gaps were just too big and would look bad filled. But they weren’t molded with the holes, and the inside contained no detail. Here’s a reference photo.
You can see that the kit molded the “holes” as raised bumps, so first step was to sand that off.
Then drilled pilot holes and used a knife to open up the openings – it was’t a very clean job as small as they are, and I had to get creative with sandpaper and third hand tweezers to sand them as smooth as I could get them.
Then used sheet styrene to create the back side and open up the slots in that piece as well. Overall, once done and from a distance, I think they’ll at least look more realistic.