If you don't run long trains, aren't the MT Z body-mounts what people shout for? At some point, "scale" couplers in 1/160th become an engineering exercise. What materials are available that are strong enough, can be made easily and cheap enough to be viable in the marketplace? There aren't very many. Maybe the B-mann coupler will "go". It doesn't look bad, should be priced low, and the N-TRAKer's will find out how strong it is. I still have stash of the non-operating InterMoutain couplers that twisted right into a "T-shank" pocket. Great for "unit trains".