Started diving into my rear spring change today and one of the J-nuts that fastens the cup holding the front leaf spring eye is pooped. So, I'm changing all six nuts and putting in new bolts. Does anyone have any experience with the reproduction cups? I haven't had one in my hands, so I have no idea what they are like. Figured I may as well change my crusty originals while I'm in there, but I dont want to order them if they are garbage. Thanks!