Hey Andrew,
Sorry for the late reply. I do still have the Alpha 9 and it has over 52,000 miles on it at this point. No changes have been made to the setup other than a different exhaust (Unobtanium Welding) for sound. Still love the car, pulls just a strong as the day it arrived back from AMS.
Feel free to message me if you have any questions about AMS or their product.
Alan