CEDAR RAPIDS — It’s been a quiet week in his shop, but Brian Vanderpool isn’t worried.“Right now is our slow season,” said Vanderpool. “April, May, June is the busy season — maybe July, August, depending on the weather. Usually stating in November it slows down and it just putters along.”Vanderpool started Chappy’s — his old stock-car-racing nickname — in 2011, when he was the service manager for a Cedar Rapids equipment-rental business.“Theisen’s contacted me and asked me to be their service center,” he said.Since then, he’s taken on the same role for most of the area’s home improvement centers.“I don’t hand out business cards, they do,” Vanderpool said.