When Fountain and I were part of a foursome that set an endurance record from Key West, Florida, to Cancun, Mexico, we used a 48 Express Cruiser powered by triple Yanmar diesels with Arneson surface drives. It ran 65 mph, but the company found that few customers wanted or needed to go that fast. Plus, at that speed, the belowdecks components took a beating. So Fountain scaled back to twin 480-bhp Cummins QSB5.9 diesels. With Arneson ASD-8 surface drives, the boat hits a respectable 51.6 mph. The twin-stepped bottom design hasn't changed and the handling hasn't suffered. I turned the boat at wide open and it carved effortlessly. Plus, a driver's ability to trim the Arnesons makes the 48 Express Cruiser more versatile. In rough water trim down the drives and the tabs, and you're on plane and making headway at only 18 mph. A conventional straight-shaft inboard would be wallowing in the waves. And when the waves lay down, you can lean on the throttles and trim up the drives to top 50 mph or cruise smoothly at 41 mph at 2700 rpm or 34.5 at 2400.