Hi folks! I've got a question with regards to the purple-colored plastic piece that covers the horn on the back of the detector. Does anyone know whether or not performance of the detector will be affected if this piece receives some minor scratches? I don't think that it would since the radar waves (microwave energy) will penetrate vehicle windshields. I noticed mine had some scratches the other day that were vertical (presumably from mounting the detector behind the rear view mirror and this rubbing up against the windshield in the process) and I had to ask myself if this would affect performance of the detector. Anyone know for certain though?