Ok, I guess I have to ask this no matter how bad it makes me look. I know there is a difference in the L program and the HD program. Why can't the L program be downloaded into that "micro tuner" and uploaded into the HD's? Is there anything inside the HD's that are different?...say cams or any other mechanical part that would alter the L program? If not, then why not upload the L program into the HD and then do whatever mods you want from there with the L program as your baseline?

 

Other than maybe accountting for the HD's added wieght in the timing table. There should be no differences.