I just finished installing my DB Electrical starter and I need to shim it. Is shimming a starter pretty straight forward? I figured I have to drop the dust pan and see how it needs to be shimmed. Also will it hurt to drive it before I shim it. I've only started it twice now and probably would have to start it three more times if I drive my truck to pick up the shims. Any help would be appreciated. Oh! and I am assuming one thing; that when I start my truck and it makes a loud metal to metal skretch after starting that the starter needs to be shimmed.