hey guys I know this is probably a stupid question I'm sorry but I cant find out how to compress the brake pistons on the rear of my 95 cobra. I haven't tried the front yet so I don't know if they will have problems too. but does anyone know if theres a trick to this? I'm using a 6 in c clamp not directly on the piston on the old pad onto the piston and its not budging. I'm sorry if I'm missing something really easy I just don't know what to do. help would be greatly greatly appreciated.