<p>I wouldn't say it is a "bad" idea, just that you already have excellent scores. (Similar to mine, and I was accepted to UCB, UCLA and USC.) You could take them again, but at this point you might want to turn your attention to your essays and how to best present your ECs. You get a teeny-tiny amount of space (I am remembering a title and about 25 words of description?) to describe them, so you want to start working on how you are going to give them impact in just a few words. Good luck!</p>