Scottish Formula Ford 1600 champion Jordan Gronkowski rounded off the season in perfect fashion by claiming another dominant double at Knockhill.
The Van Diemen driver continued the form book by topping qualifying by over half a second from the Ray of Neil Broome.
Graham Brunton Racing interloper Ciaran Haggerty struggled to find a clean lap in the session with the 2014 champion lining up third on the grid.
Gronkowski led away from the safety car start – due to torrential rain affecting most of the day’s running – while Haggerty moved up to second at McIntyres.
Haggerty was comfortable in second but could not mount a serious attack on Gronkowski, who claimed his 11th win of the season by 8.865s.
Broome finished on the podium in third to wrap up third place in the standings, ahead of Chisholm and GBR’s Logan Hannah.
It was a similar story at the start of race two, as Gronkowski leapt off the line to beat Haggerty into Duffus.
Behind, Hannah made a superb start to jump two places and take third, but lost the rear of her Ray at Butchers after hitting a patch of standing water.
Gronkowski quickly opened a 3.707s advanced over Haggerty at the front, while Broome struggled to keep pace with the leading pair.
Not content with simply leading, Gronkowski pumped in a series of fastest laps to stretch his lead to over five seconds by half distance.
Broome and Chisholm were closely matched all race but the latter never looked like making a move on the Ray for third and had to make do with a finish just off the podium. Hannah recovered from he earlier spin to finish fifth.
Race one result
|1||Jordan Gronkowski||Van Diemen||9 laps|
|4||Matthew Chisholm||Van Diemen||+21.851|
Race two result
|1||Jordan Gronkowski||Van Diemen||10 laps|
|4||Matthew Chisholm||Van Diemen||+19.730|