Hello, please tell me. I am looking for a tuner zf8 for the Audi A8 D4 4.0 2013. Many people improve their results, but I am not alone in the opinion that the best results cannot be achieved without tuning the box. I have a very good consistent result, but I'm worried about the box, the lack of shift points, faster shifting and the lack of AMAX frustrates me. I understand that I can be even faster. Help