I just finished to body/paint on my 68. I bought a antenna from NPD. I can not believe that I have to remove the fender to get the thing installed. I got the wire routed fine but I can not get the base deep enough into the fender to install the metal ring that is on the underside of the fender. I think I should have shaved the hole and used a hidden antenna. Has anyone had this issue? Help please !!!