I have a shimano 105 BR-1055 brake caliper and a shimano 600 BR-6403. I was wondering how to remove the SLR brake cable arm? Specificaly does anyone know to remove the dust cover? I tried to pry it with a mini flat head but no dice. I would like to see if I can swap it out for the rusted one on the 600 unit. I took the 600 arm apart, it rotates on a spring tensioned bearing. Intresting.Brakes_2011.jpg