Typically, the lead is placed as far back in a rear corner as possible. That is the basic point of lead weight; a lot of mass in a small area. Of course, too much weight on one side is going to negate the surfgate. I do not have first hand experience with the T-22, but do have experience with the surfgate on similar hulls. Start with equal weight in the rear 400-750, bow weight, mid range and surfgate. Then list the boat to one side by removing ballast on the opposite side and see what you can do.
We will be interested to see what you find out.