"Anyone know if you can do a CAT A Class 2 downwind take off?"
Are you asking can you do a Category A, Performance Class 2 takeoff? If so, I think they are mutually exclusive. (Perhaps Mars can help me out with that one). I think you can only do a Category A, Performance Class 1 takeoff. There are a lot of different terms here: CAT A, Class 2, PC1, Class A, Class A certification. Does Class 2 mean PC2? What does Class A mean, and what is a Class A Certification? Are we mixing apples and oranges? That is, are we mixing/interchanging certification regulations with operations regulations?