new to this site not very computer savvy. i just installed a dual whip antenna system on a 2006 freightliner Columbia. antenna's were easy to install and didn't have to tune them once installed. started driving today after installing them last night and did a moving check of the swr on the swr meter on my cobra 29 lx lcd. now not for sure cause its hard to concentrate on the road but it is between 2 and 3 guessing 2.4:1 rough estimate. that is while moving my next break i checked the swr's again and it was below 1:1 maybe 1.5:1. still trying to get used to reading that display. the only reason i checked it while moving was i was getting distortion while moving but a crystal clear sound while sitting in the truck stop. the cb itself is cobra and the antenna is the mix and match crap you can get at just about any truck stop. antennas are fiberglass for now looking at getting something different down the road also they are angled forward so as to keep them off the same plane as my xm radio. mounts are specifically for a frieghtliner/mack mirror mount and wiring consists of 2 9' pieces of i believe rg58 and a t with a double male and a 3' pc of rg58 going into the back of radio. since i cannot check the ground going down the road and it is kinda hard to check directly to the negative terminal from the mirror since my batteries are under my cat walk i tried directly to a bare metal spot i could find and my ground plane seems fine when it comes to a ground plane while not moving. could the vibration of my semi cause a bad ground plane while driving down the road and if so should i mount a ground bracket to the mounts? any advice would be helpfull.