I agree that replacing 153C contactors is the most popular use for relays. However the “Kalmbach” circuit, which I have described many times on the forum, is simpler: http://cs.trains.com/ctt/f/95/p/204253/2234035.aspx#2234035
I agree that replacing 153C contactors is the most popular use for relays. However the “Kalmbach” circuit, which I have described many times on the forum, is simpler: http://cs.trains.com/ctt/f/95/p/204253/2234035.aspx#2234035