Looking at the model there are two things which have stood out to me as being notably off, one being the bright copper pickups, the other being the colour of the cab, for a as built loco. they have notably taken the colour from the real loco as preserved which is the wrong cab colour anyway! http://alexgroverail.fotopic.net/p20318564.html the picture here is the colour the loco should be! I know the owners of those locos and aware that they in depth checked the BR spec before painting there engines. And the cab colour has 3 different specs with the suppliers all slightly different shades.