First of all, thanks for the awesome posts on your blog, Charles. They've helped me gradually bounce back from my SEO failures. I currently have an adult campaign that's profitable without much optimization. My issue is with my banner testing process. Right now, I have 2 batches of 5 winning banners (10 total) and want to come up with 1 more batch of banners to rotate. To find more winning banners, is it better to keep rotating these 2 batches while running 1-2 new banners in each batch? Or am I better off pausing my winning banners and running only new banners until I find my next batch of high performers?