I just ordered a Retro Sound Model One from MSA and I will be installing it after I redo my DEF cable that is not functioning. Are there any pitfalls to installing a radio. Any advice. I know it is only a few wires, but is there something I could do to help myself out. Any advice on antenna's, how to prevent engine noise, etc. I do have a spare power antenna I want to install in the car, as mine does not seem to work. I have not done any troubleshooting yet. I know my up down switch has powe