Seeing I'm the kind of guy who Absolutely refuses to punch a hole in the roof of my new truck it brings the question to mind, Has anybody ever ran a piece of antenna coax thru a piece of BX cable shielding and put it up thru the floor of their truck to protect it from road grit and damage. I'm thinking about putting a new cap on my new truck and thinking about exploring NGP antennas that aren't too high because of all the trees in my local area. I don't think the BX Shielding would cause any RF problems but then again I don't know it all so I ask from the wealth of knowledge ? Also did anybody ever do a dual NGP antenna system to make up for shorter antennas ? I like to make my mistakes on the drawing board before my wallet ! LOL