If you do a search, you will find most posts are not good about the amss setup. I've heard that you can even lose power. I do not know first hand, but others do.
I recommend Hotshot (for GT), Trial or TRD
(for GTS), keep your original dp (or custom), and custom the rest.
You don't have to go by only what I say. Just run a search and see what you find out.