Adelaide 's Matthew Willoughby 's sixth place in this final race secured him a third overall in the series .
Nerang 's Steven Janssen placed third in the final race but maintains second place overall in the series .
Adelaide 's Matthew Willoughby 's sixth place in this final race secured Steven Janssen a third overall in the series .
Nerang 's Steven Janssen placed third in the final race but maintains second place overall in the series .