I should clarify that 3:50 will only be possible for me if the conditions are perfect, and my right IT-band, which has been silent for 10 months, doesn't decide to go haywire!
I hope the conditions are better than for the Dallas WR last month. It was very warm and the 2nd half of the race was into about 25 mph wind; it was brutal. I won't even say how far off my time goal I was.