Hey all, I'm looking to replace the current head unit of my '99 eldorado ESC with a Sony XAVAX1000. I don't have the bose / CD player in the car, just the Casette Delco one. What are some pointers here? I've heard a lot of issues with security when replacing these, especially the devilles. Does the eldorado suffer from the same issue unless I re-route the factory radio to the trunk? I currently have the understanding that this is only required if you have the bose HU, but please correct me if I'm wrong. If I buy the metra harness adapter, will I need anything else? Running a wire from the battery or something to keep it powered and not lose presets? Any guidance here is appreciated!