Thanks for the clarification.Right...and I probably didn't explain it well...was just saying that just because he can tune my 07 2.4 Sky doesn't mean he could then tune an 08 Redline Sky because he doesn't have the credits for that car.
One more thing: If two '08s come, it is still $100 EACH. Just because Joe Blow pays $100 for 2 credits, any additional '08s will also have to pay $100 for their tunes.
One more thing #2: If he is tuning multiple models of the same motor, like 5 LNFs, each additional tune becomes easier (and quicker) for the Tuner. As long as the cars are equipped the same, what he (and the ECM) "learns" on the first LNF can be applied to the second LNF, and so on down the line. This only applies to the "initial tune" which helps the Tuner get to a baseline tune quicker. EACH WILL STILL NEED ON-THE-ROAD "LEARNING AND SUBSEQUENT FINE TUNING.