Quote Originally Posted by pbkid View Post
i think the same could happen with a BAC tester. you could test yourself a few times after having 2 beers and think.. ok i know that im only at .06 after 2 beers... but what you dont think of is how much water you had.. maybe the days you tested it you had drank half a gallon of water, but one day you only drink one glass and have 2 beers at the bar.... BOOM.. dui....

make sense??
Sure, that could happen. But I don't see the harm in seeing what my BAC is when I feel "fine" to drive after some drinking. Maybe I am actually fine... but maybe I am not. I want to get a rough personal calibration, because right now I have no freeking idea.