Hi, I went thru the SAME thing with my 94 Tomos TT, to fix it I sanded the entire shoe, then at the heal and toe of the shoes, bevel off the square edge... Free up the actuating thing so it works good, you do want the drum clean!!! but sanding it shinny smooth, you may as well shoot yourself in the foot! You got to have friction...go over with rough paper.... and like a car they are not set up to do much stopping going backwards. PS- ck and make sure the cable is not just flexing when brakes applied ....had to change that also. Remember that they have to be worn in (seated) also, give it a chance... Sorry to be windy! Doug D. in VA.