would love to hear that explanation, the tear down i watched didn’t suggest any such thing. how would they do it? an optical sensor and something about the one red cog? a magnetic sensor and an insert of some sort into the cassette? never seen any reference to this!I'm pretty sure that I listened to a podcast where a guy from SRAM explained the system in such a way that it somehow *does* know the position of the cassette and then moves the derailleur at just the right time to catch the ramps. I'll do some digging on this when I get a chance...