I got the worse score so far :D
I also had 24, but a very different graph. Mine was equal all the way across with 2 small humps in the blue.
My wife & i just did it together. Myself for the second time and her for the first. I got an 8 the first time I tried and actually a 0 on the second, she scored 51 on her first attempt. She claimed lack of natural light as her fault (we did it at night)...I don't recall when I did my first try. Kind of satisfying for me when we stand in the Home Depot paint ilse next time if you know what I mean =)