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As noted already, I think both are good. I hear GPI is faster on response, and Brett is a really busy guy all the time.
I am Pray remote tuned. He was very accurate and good to work with. Did my mods in two stages. End result, car is well mannered and "stock like" at under 1/2 throttle. After that, it's just a beast. So I am a happy customer. I track, and his mods and tune have performed flawlessly for me in those settings as well.
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