There is no "electronic" shifting. All that the Campy and Shimano "electronic" systems are are amazingly marked-up micro controllers, battery packs, stepper motors and simplistic sensors. They make the RaspberryPi look like a supercomputer and they are electrically operated mechanical devices at heart. Any modifications to these electro-mechanical shifters would be simpler as a purely mechanical system. And, I've seen both Shimano and Campy trying to wall these overpriced doodads off from their other high-end lines.
Sorry to be rude. Being an electronics and software guy professionally, seeing things that are so abusively over marketed to leverage the ignorance of potential customers is like watching someone be mugged.