Just pulled a Dia Compe N500 front brake off a Raleigh Technium 440 so I can use it on my Gran Turismo. There are two nuts in the front -- one is the lock nut and the other (a much thinner nut) is for adjusting the spring tension (I think). first question: what kind of wrench do you use on the thinner nut? I don't have anything that thin. Second: how do you adjust the distance of the brake pads from the rims? When I try to center the brakes by holding them with my hand and tightening the nut on the back of the front bridge, the brakes end up with one side working fine and the other pad being too close to the rim. Thanks!