if you know it all why are you asking us for help? i don't ever understand when people ask for help and the belittle everything a person is offering to try and help with. wow. go ahead, skimp on the most important part of your car and see how that works out for you. me personally, i will stick to a tuning professional to tune my car. and thus far it was been perfect. my car makes a good number on the dyno and on the track. and my tune was custom built from the ground up. not some bs like your mentioning. in my humble opinion running a tune that someone in a different state built is just asking to buy a new motor. there is no way to recreate the enviornment from 3 states away. but, hey, maybe your wallet is alot deeper and you like buying motors. to each thier own!