I am installing me new headliner today and wiring my CB above my rear view for a semi look. So heres the deal. Theres the layer of fabric, glue, foam, glued to the shell board. My shell is very very thin. Do i need to get a new piece of foam also? I dont see how the shell would keep its shape with no foam left on it. Any help is great. Im in the middle of it right now so the sooner the responses the better ha.