For ME, it is what BELONGS behind a Big Boy, Late Challenger and I believe it was the FEF-2's and later that got the PT tenders. IIRC the FEF-1's (800-819) were delivered with standard type tenders, and the FEF2/3's (820-844) got the PT's. To ME putting a standard tender behind the Challengers, Big Boys or FEF-2/3's would look as out place as putting SAILS on the Queen Mary, or the USS Nimitz, just don't belong. I neither particularly like or dislike, they are just what SHOULD be there.
Doug