The accommodations were not the only place Four Winns applied its boat design expertise. The HD 220 hull was modified to incorporate a set-back bracket for the outboard, which preserves much of the swim platform. Plus, the HD 220 OB has a unique running surface, with a pad keel that Four Winns says accommodates the change in weight distribution with outboard power. The set-back motor gives the prop great trim leverage, and the HD 220 OB really aired out when we trimmed to get the last 500 rpm of top speed. The ride in some stiff lake chop was outstanding, and this all-fiberglass boat feels really solid.