The other day, I tried to lower my antenna in order to wash my car, well the antenna was stuck. I tried removing the 2 screws holding the antenna so that I can see where the friction was and in doing so, one of the screws broke. So now my antenna is held on with just the forward screw and I still can't get it to budge. Also, the screw has caused the area under the antenna to rust. How difficult is it to retrofit the rear quarter window on a BH5 with the antenna and just patch the roof where the current antenna resides? I have never done rust repair before and have no idea how to go about doing it.