Don't be so quick to jump on Steve. One thing has nothing to do with another. I've used products from Jerry since the days that he was working with Eric under name L.E.T. and lived in Chicago. Quality vendor and a super good guy that I know personally. And I have a TCU tune from a few years ago that when I shift from 3rd to 4th, makes AFR's go to 18. I'm obviously not using that TCU now. But love the idea of faster shifts and manual mode. If the file has changed, that's good new. The original file came form another AMG type and EC could not change anything other than load it. If you do have graphs, please post them. I'm also interested to know what your rev limiter is set to.