Did anyone replace the radio antenna before? I've got a long crack on the antenna base (or holder). I'm considering to replace it. If possible, I really want to replace it with a shark fin. However, I don't know which one fits my 04 Ralli and how to do it. I guess there might be a lot of work to do, because I may have to remove the roof or open it from the rear screen shield. And the harness may another issue. Thank you very much!