Ok,this might be a dumb ?,but every place I see that sell the wilson 5000 mag mount has,that it has 17ft of coax,but if you go to their site it tells you to use 18ft. when replacing it. Are they getting us both ways(they short us a ft. then want us to buy and extra ft. Anybody know if it's going to make a difference? I know that a magnet mount is a different beast as far as the ground part.