...it took me perhaps an hour and a half...but, then again I'm 68 years old and a slow reader.
I think what you meant to say is that you are cautious and methodical based on years of experience.

Hey rlc, where are you located? Maybe there is a nearby Scion fanatic that would help you with the installation. Failing that, it's probably better to get some quotes from local shops. Prices can vary quite a bit from one place to another, so what I might have to pay may have no bearing on your cost.