Just keep in mind that a person that can tune a O.S. may not get the tune right on a nova, they are 2 diff engines, when i went from the OS to the Nova i was trying to tune it the same way as the OS and that doesnt work, I am not saying that ur peps dont know what they are doing, it can throw a good tuner a loop if they never had 1 before and learned the diff in the 2