One thing I noticed that was interesting was the pink boat had the boom on track that went in a horseshoe around the boat. Wonder why that is? Is that just a really long traveler? If you look at either of the pics you can see it go all the way around.
Yes, just a long traveller that goes around in the same radius of the boom, so when the boom goes out or in, no need to adjust the main sheet..
In the old days, of the 12M the America's Cup boats had that too, mear the mast.