Keith over at Custom Works in California has helped me design the brake system. I decided on a Manual Brake setup so I would have more "feel" on track days. Here is the Dual Master cylinder we selected with 3/4 inch bores and 3/16 lines. It is made by CNC in San Diego. That size will help lower the amount of pressure required by my leg on the Manual Brake setup.
http://www.youtube.com/watch?v=4zZh0s2ce0Q