The heart of Total Air Supply’s sheet metal shop was a 30-year-old Engel Industries coil line. The front of it, production manager Rich Hagerty said, was “as solid and fast as anything you can buy today.” But the back end was slowing the New Hampshire-based operation to 22 feet per minute. Company Vice President Sue Quintiliani and Hagerty wanted to increase production. They looked at each piece in the shop, calculating the return on investment if they replaced them. They decided the first two pieces that should be changed were the insulator and pinner, both originals. They chose an extruded adhesive system from Iowa Precision Industries and a Power Pinner 50 welder made by Gripnail Corp.