I just got a new faceplate for my Kenwood VR-507. The old one was badly smudged by service techs. Just to be clear, we're talking about the smoked plastic covering the display. Anyway, I don't know how to get the old one off. Looking at the new one, it looks like it just clips on. I've tried pulling on the old one, but I don't want to break anything. Any advice? Do you think I'll have to take off the outside cover? How much is there to taking the cover off and on? Thanks.