Training, racing and finishing a second Ironman is not like the first. It is both easier and harder. Easier because all of the mysteries, like the behind-the-scenes details of transition, were revealed during last year’s race. Harder because you know what’s coming. Easier because you’ve done it once, and there isn’t the pressure of wondering whether or not you can do it. Harder because there is the pressure of doing it better, faster, stronger. Going in to this year’s Ironman Lake Placid, I was feeling the pressure. It’s not like I didn’t have pressure last year, but it was more …