Mounted a whip & spring on the Passenger side front stake hole mount using the Firestick SS bed rail mount. I've been adding grounds like crazy, helping, but still not perfect. I can't seem to get my SWR's down. I'm at 1.4 & 1.9 reading "short" on length. I see A LOT of Superdutys and trucks in general running a 4' fiberglass antenna behind the cab in this location. Makes me wonder what their SWR's are, or if they even checked them. Any of you guys have this problem also???