I agree it may flex at highway speed. Not until summer, though. This stuff is rigid in this cold weather. Also, being slightly curved should help its strength. I do not mind reinforcing it, though.
Yes it is very easy to move. I used factory mount holes.
I have seen a number of them mounted back like this. The Volt is a couple inches further forward and my 93 saturn factory dam was nearly the same location. That being said, I only mounted it there because there were easy to access holes right there.
I originally wanted it at the very nose of the car. It would have taken a huge amount of work to make it look decent, though. I would have hit nearly everything too.
I am open to doing something different, though.
I cannot wait to do some ABA testing. The weather just does not permit it, though. It goes from 15 degrees and sunny to 25 degrees and windy within an hour this time of year.
Matt