so it's year specific??? My car is a 1998 and I would like to have the ability to allow others to tune using my tuner. If they have a 99 they would have to purchase credits, but if they have a 98 then I can tune theirs for no extra fee???

Now the tuner I get can do my friends Ford Focuss, Mustangs, etc. if they wanted to use it, as long as they purchase the credits, right? Or is the tuner Make specific???

I'm thinking of purchasing the tuner off ebay tomorrow because they guarantee fast shipping and everything is exactly the same as the website. Sound good or should I not risk it and go straight to the source???