The last report on the shelf couplers is that Jimmy Booth is producing E double shelf couplers for tank cars. The government mandated that all railroads have these couplers installed by 1978. The railroads began installing more of the lower shelf couplers on general non-tanker freight and diesels in the years right up to this day. Jimmy also is producing the lower shelf coupler as well as the H Tightlock couplers for passenger trains. Jim Lincoln designed the couplers is the word I got from Jim a long time back. The couplers are supposed to be here this January but I don't know.
I'm only guessing that passenger cars use F couplers nowadays,but freight's my thing so I can't say for sure. According to Sam Clarke at Kadee,F couplers and H couplers were in existence before the E shelf couplers. These couplers will be able to be operated by cut levers from the top or bottom as well as by magnet. Protocraft sells this magnet & it's great too and will pull the trip pins to the side for handy uncoupling of Kadee&Atlas coupers.
Thanks for thinking of me Bob,if you have more updated info on these couplers,I'd sure be happy to know more about them and anxious to get some.
Jim Lincoln is experimenting with mounting as soon as he gets couplers from Jimmy,as these are made to fit a Protocraft type coupler box. In my experimenting with the modern Protocraft couplers,I cut off the pin located on the rear of the coupler&they will fit a Kadee coupler box.