I just picked up a set of 6* shims from the local speed shop for my zero rates. I was getting ready to bolt them up when I grabbed the center pin and pit it in the shim... The hole in the shim is big enough for the head of the center pin to sink below it (meaning no center pin after the shim is on) Is the pin supposed to go inside the shim or do I need different shims? I need to finish this stuff by Sunday so any help is greatly appreciated. Thanks!!!