On the road the double BSA was 'ok' When I started racing on it, Debo said give me that front brake. He took it away and gave it to a bloke who had worked for Ferrodo. When I used it next the braking had improved no end. Took me a couple of races to get used to it. I was braking way too early. What he had done was put three different types of lining material on it. The trailing shoes had one type of lining, but the leading shoes had two different grades of lining. The first 1 1/2" of the shoes has what I believe is a harder material. This is the part of the brake that cops the severest braking. There is then a small gap of about 1/4" to the rest of the lining. What the lining materials are I do not know, I was never told but it does work very well.