Well i gave that example because of the cost. First off let me say that i would not recomend a zzp pcm. So don't think that i am. What i am saying is that if you're going to be changing you're mods a lot it would be CHEAPER to just buy a tuner. Because more times than not depending on how far you go with you're modding it is benefitial to change you're tune when you change to different mods...on a performance standpoint.
So therefor it would be cheaper to buy a tuner rather to send the pcm back everytime you change something on you're car and them RECHARGE you.
With a tuner you can change anything you want anytime you want as many times you want.
Does that make sense?