No one ever shows the SWR reading? Its very high! Some of the readings depending on the type of antenna was up to 11.2 to 1... I had to strap a ground strap to the frame to get the SWR down to a reasonable match. Or find an antenna that does not require a ground plain? To much reflective wave back into the radio will destroy it. Just my take on the GMRS/HAM radio installs in jeeps.
Regarding the antenna mount there seems to be controversy in the Jeep community whether or not the mount should be grounded to the body or not with some stating to chip off powder coating of the mount so the mounting screw will make contact. This does seem like something that needs addressed because if it should be isolated the powder coat will have a fair chance of eventually not providing isolation between torquing the screw along with trail vibration.