Would I get a proper earth from just filing away the paint on the bracket where it attatches to the bolts ? Or would I need to run an earth to the car body etc. Also I am looking to fit a wilson 1000 to the bracket what connections would you suggest ?
It's Ok for protecting the antenna in off-road situations and looks good, but the mount finishes half-way up the back window, so not too good for range and maybe the SWR will be a problem too.
If you can mount an antenna on the roof then do that, as it's the optimum location.