Two of the things that impress me most about Gerrit's models are his excellent ability to render complex paint schemes in brick form and the spot on proportions of his 6wide models. His SD40-2 is a perfect example.
The EMD SD40-2 is also one of my favorite modern diesels. One of the unique features of the engine is the large platforms (or porches as they are sometimes referred to by railfans) at the front and rear. The SD40-2 shared a frame with the larger SD45-2 but used a shorter car body. The extra space not used by the carbody gives the SD40-2 it distinctive "porches" and easily recognizable appearance.