I have two antenas..one a CB and the other a VHF. I have them mounted, one on each side, where the hood line is. They are forward of centre so that they both kind of lean outward facing. Keeps them from tapping on the overhead/ I also slid a piece of rubber tubing down each one to add some stiffness.
And now that I have been edumacted about NGP..I am going to switch to one. My transmissions have always been terrible.
Gary Haupt