4, including MQB.
If you're not doing MQB stuff, there's no need to clone eeprom, flash is enough because there is no immo in dsg. Clone kess, mini dsg reader and other cheap things can read/write flash.
Thanks for the info. This is the one in my car. Can I put in it any functioning CXX and expect the car to work as before or does something else need to be done (apart from adaptations)?