So, a question for you Alco-hounds out there. I'm looking at using some RS-3's for my freelance railroad and Kato RS-2's miss the mark just barely. How hard would it be to update an RS-2 to look like an RS-3? That is, what are the visual distinctions that seperate an RS-2 from an RS-3. I know that one of them is the longer battery boxes along the short hood. Are there any other differences that I need to know about? Thanks!