i just picked up the BT retrofit, and the iphone cradle. anyone got any hints on how to remove the centre piece of the bits under the armrest? there are now 3 'pockets' there, and apaprently the centre one is easy to remove, but its not! i can get under the armrest to the wiring, but the actual part that has to come out, for the iphone cradle to be put in, just wont budge