Hello, Well this morning royal snail had finally delivered my heatsink snowy pads, waited to the rain held off for a bit and put them on my bike and go try them out, at first impresions were not good, so i thought maybe they would take sometime to wear in, half an hour later, still no joy i have a grind on my rim and i was thinking do i need to give my rim a fresh grind?? Help please. Cheers Connor