Everyone says to sand down the LEDs or you will have bright spots. Listen to them; I did not sand the bulbs down and the bright spots are very evident. Sand down any of the interior LEDs, the light is very directional otherwise.
When you have the gauge cluster and pods removed, wrap the wires behind the pods in a thin foam. I found this to be a source of rattles. BMW wraps their door connectors and wires with foam and it greatly decreases rattles.