Hello, just purchased a Bachmann 21 pin chassis off of the auction site we all use at times. Along with that I bought a Bachmann Sir Daniel Gooch body. Now they dont appear to go together, the issue appears to be the little white circuit boards where the cab is, they appear to be about a mm too long and so the body sits on them. They are both genuine Bachmann, are different ranges (ie release dates) not compatible for body swaps? Or am I missing something obvious as a fix? Ta muchly in advance for any advice.