We have a motorhome with the Front Cap that is constructed out of fiberglass. Normally we have the little antenna puck sitting on the dash, and if heading south get fair to middling reception. Going north it is essentially Kaput. I do NOT want to drill any more holes in the roof, don't want to chance water leakage. On another site somebody mentioned that you can mount the antenna puck up near the ceiling (on the inside!!!) and get good reception since fiberglass doesn't block the signal. Is it true (I Hope -- No Holes)?????