Hi BomberDave,
Great board! I sold my Style and regret it.
I found the stock fin quite good for noseriding but it felt a bit much the rest of the time. Karl's suggestion makes good sense. I'm an okay surfer who spends a lot of time in wonky beach breaks.
The bloke I bought mine from gave me a 4.7 inch Shapers fin for the centre box and told me to try it in a kind of thruster set up when I wanted a more manoeuvrable fun board. It was amazing how much it transformed the board. Like having another SUP for the price of a fin.
It's not what you'd want when you really want to seriously noseride, but I recommend it as a really good extra option, for certain types of fun days.