I don't start doing this until I've made an error. Often a third of the board is no longer on my radar at that point. So I will rarely compete on bonus words. I'm usually in the top 15-20% on accuracy, though, when I'm not perfect.I get lots of bonus words because when I get stuck, I start trying random combinations of letters. This means I'll never get the perfect accuracy bonus or the time bonus, but oftentimes I'll accidentally get bonus words.