I'm changing handlebars and I untaped my bar, and rolled back the brake hoods on my Shimano Ultegra brake lever/shifter. I took out the small screw on the inward facing side of the base that was covered by the hoods. The brake levers are still fastened tight. I haven't removed them since 2004 . . . . . is there another screw to remove, or is it just stuck from age?