We can do the same thing during a road tune. Which is why any included dyno benefits you even more. Might as well go with Powerchip and question how they tune your car also. It's to the consumer's advantage to bring a printout of a dyno and mail it with the ECU. If not, we essentially "touch up what's missing" and tune with whatever we have to work with, including what we actually see coming from your ECU.