>>197534well as they say all mobile installations are a compromise.
I do a fair bit of offroading, so I have 2 antennas that are on a quick disconnect system.
102' whip for dx/road trips, and a 3' firestik for offroading. Both are on a spring and a breedlove ball mount with quick disconnect.
the spring is key man, always run a spring.
(except that my 144/440mhz antenna is roof mounted and I can't use a spring, so I just take it off when I'm going offroad.)