Thinking about getting a GIAC X from one of the guys on the site. Done some research and found out a lot of goodies on it. Now I want to hear from a personal experience of people who has it in their car. I have a bone stock S4 quattro with tip tranny. Would just swapping ecus would do the trick or do i need to get TCU also? Something about TIP going in limp mode or something. Anyways... any help and info would be much appreciated. Thanks