Two-Story 8 Slot High Saddle Trailer v1.0.4
High-Saddle compatible trailer with 8-slot capacity: packable 4-slots on lower level and loose 4-slots on upper level. Double decker style. Can be configured as a road-train with “extension” trailers (no winch).
Theoretically you could have an infinite number of trailers in the train.
Practically you can only have two. But you still have your winch for normal use, so that’s good.