Indeed. And local experimentation/figuring out what works is awesome. I chose the path of looking at the same thing exclusively from a global perspective (the other forum) and going by the advice of well-established tuners who'd figured out all that stuff. This was mostly due to necessity, like I said, because we didn't have a lot of engine tear-downs/swaps that I could learn from. That's why I chose Justin: I knew following his advice/using his calibration would avail me the practical experience of one of the best/most knowledgeable MZR DISI tuners in the world, and that he wouldn't lead me astray regarding hard parts/setup.