Originally Posted by
DubT
If you want to go electronic you might want to wait for SRAM to release their new wireless system for mountain bikes. I am confident that is in their plans. That way you do not have to have your frame modified to receive internally wiring. You will need a rear wheel that will accept an 11 speed cassette and you will probably need new cranks.
As I understood it, at least with early SRAM wireless electronic front derailleurs, it would send a "shift" command without the state, so I believe it only worked with a double chainring.