Talk about shifting gears. Allen Lewerer grew up in the western Wisconsin community where he still lives and works, but when he opened his shop a year ago he was the new guy in town. After nearly three decades of doing mostly new construction plumbing, he was taking on a new niche: service plumbing. And accustomed to working just for his father in a small, local shop, he now finds himself part of a national operation as a Mr. Rooter affiliate. He has no regrets about any of it.Lewerer, 46, operates Mr. Rooter of St. Croix Valley out of New
