You have been professional in every way. I know my tune was not complete because of problems with my car. I was just not sure why the charge was the same for 2 pulls and half of a tune. I noticed my RPM's went to 8500 the other day. Did the SZ tune have a rev limiter, or is my tach off? It is stopping at 7200 now with the Z1 chip? I know your input was informative and thanks for that.