Just purchased a mint pair of 7-speed Sachs brifters and am trying to figure out what rear derailleur they will control other than Sachs. I know the later Sachs units were near copies of Campy rear derails but I'm at a loss as to what these will be compatible with. I was told they would work great with Shimano 7speed rears but found that hard to believe.
Also, do they work freewheels or cassettes or does it make a difference.
Any help is greatly appreciated, thanks.