I just got a new CB radio and antenna today. I have three questions. First, would it be ok to splice in the power from my current stereo to power the CB? Could i play them at the same time? Secondly, I am using a ball mount to hold the antenna. How do I make sure it doea not ground out on the car? Thirdly, the antenna company (Firestick) keeps talking about SWR. Do i adjust this by screwing and unscrewing the antenna on top? How do I test this? Any thoughts would be very appreciated because I'm going to tackle this thing on tuesday.