Okay, I know what you are trying to say. The reason Syncro didn't work well was because Campagnolo was trying to index their inline parallelogram derailleurs. #1 the different derailleurs had different cable pulls; the distance the derailleur moves when the cable is pulled. Because of this Campy had to create different index rings for different derailleurs; hence the different colors. This was not to match freewheels; if a 7 speed freewheel did not have 5mm spaced cogs, Syncro would simply not work (there was some experimentation here I'm sure but it was outside the design of Syncro. #2) Campy was trying to design a non-propitiatory (at least as far as freewheels went) design that was backwards compatible. As far as Shimano, it was no coincidence that their first workable index system was released a year after Suntour's Slant Parallelogram patent ran out and Shimano developed a top to bottom propitiatory system which was much added by their patent Centeron guide pulley; SIS. And it was not until Campagnolo went to a slant parallelogram rear derailleurs and their own cassette/ shifter propitiatory design that they had a competitive indexing design, which many (me included) believe to be superior to Shimano.