Alyssa HertelDes Moines RegisterShow CaptionFourth time is the charm.It took four appearances at the Principal Charity Classic for Ernie Els to get his first win in Des Moines, with the South Africa native simultaneously earning his first PGA Tour Champions win this season.“It’s very special,” Els said of the win. “I haven’t won for a while, and I’ve had quite a few chances. But it gets tougher when you don’t get it over the line.”Els, a former World No. 1 and four-time major winner, finished at 21-under-par 195 and won by two strokes.The 54-year-old birdied twice on the front nine Sunday and three times on the back nine. He picked up an eagle on lucky number 13, which gave Els the padding needed for the win, even with making par on the final three holes.“I was lucky enough to make birdie on 11,” Els said. “I didn’t need a very good approach, made a good putt. And then 12, but 13 was big to make eagle late on the back nine, that was key. Got me into a three-shot lead, and (I) kept with...