I know this thread is old but it caught my eye because I bought one of these models and I was a 53 mech. Having worked on 53s for a few years, I noticed a couple of things. The inside lights could be switched between white and blue, not red as someone mentioned. The blue was more of an aqua/green looking color, than the blue you used, but it is close enough. Also, I never saw silver, or lighter colored blade extenders as you have depicted them. They were always black. There were times when the paint kind of started coming off of them, but they were only bare on the leading edge. Also, the nickel strip on your tail rotor blades is on the trailing edge. It should be on the leading edge of the tail rotor blades. Aside from those little details, the model looks great. Better than anything I have ever built.