Regarding 11 car trains, how do they do that with R160's? These cars exist in 4 car sets and 5 car sets. That means that a train can only be 4,5, 8, 9, or 10 cars long unless some of the drawbar attachments are actually semi-permanent with a 6 car trainset being created in the shop.
i answered that in the previous post.
and yes, the link bars are semi-permanent, so sets may be re-aranged