Frank Berto says maybe in the book I was reading today. You never know. I read that somebody used to set up Simplex SX610's with Shimano six speed shifters and freewheels. The SX610 was friction only, but it had a barrel adjuster. The Super Record derailer would need a barrel adjuster, but I understand that there was one that could be added on to derailers that didn't have them when using Synchro shifters.