Another thing I forgot to mention is the cvi adaptive learning has been said to be erased after a flash. With efi it's even been said that switching the csp4 switch the adaptive learning gets erased and one should drive very carefully with some city driving and soft shifts for 30 minutes. Nothing over 30% throttle. This is true with ultra also if you do the full ecm tune, but is not necessary when using OTF, as on the fly tuning is only written into RAM, and the adaptive learning is not lost.