Wow. This topic is still going around? I thought it was explained (and somewhere there were pics of them) of how the trains are. Think of it like this:
Start with a regular 2-across train for a SLC. Have the cars be about twice as far apart as normal though. Then, on the left and right of the gap, put 2 more seats (one each side.) I think, but am not sure these are slightly angled outward, but not much. So, each car forms a V. Wasn't that complicated?
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V2, Deja Vu... how can it be better? Add Viper! Oh, wait. It's already there!