That’s great burntire, I am glad you know what you are doing. If you build every tune for every one of your customers from scratch with every parameter that goes into doing a custom tuning you are doing it right. I am saying that every time some one puts a set of long tube headers or cai, or even mild cams they don’t need to run out and spend money on a custom tune. The MAF meter will recalibrate that minor adjustment. When someone like KB a manufacture that designs, R&D’s there product and spends $100000 of dollars on getting it right that a custom tuner can ring out one or two more hp or torque than for that matter than the person that built and designed the supercharger. I would not call it a mail order tune if I give my mods to them and they give me a tune or burn a chip canned tune, they are trying to keep unscrupulious tuners from ripping off there tunes and caliming the for there own so they can tweak it and call it there own.. They build tunes from scratch with far better metering devices that most custom tune shops can not afford. There databases are far more advance than your run of the mill “custom tune” shop. By the way how long does it take you to build your custom tune, how long and how many dyno pulls to get your car right. Is that the same amount of time you use to “custom tune” your customer’s cars? Just a thought. I think people don’t give the MAF enough credit for it doing is job. Peace.