I have this setup and have a few points to make.
Regarding tuning, my SWR wen't from 2+ with just a whip, to 1.3 with a spring, to 1.0 with a spring and quick disconnect. The antenna really needs to protrude past the body. If I were to do it again, I would mount off the front bumper.
For those...
Just use that to a manual cabin light, because the only other way is to reach in the ceiling.Terrible design on Toyota's behalf, it's nice to see the 2013 model addressed this issue.