thanks slugga...I'm no pro ,but wanna be ..

. I use FC7 FCS FINS .and dance between 2 and 0 FCS rears ..
it really depends on the wave ..the 0's feel like i have no rear fins .I have sanded the inside edge of the no 2 rear fins
so they are neutral ,no flat side ,so they work like rear fins not fronts.
it was a tough wave to surf this day ,small and windy ,got blown off a few if i went to high to the lip .
i tried thrusters ,then quads then thrusters set up ,for months ,then realised i like it as a quad for the wave i was riding ,so stuck with it .
i haven't tried the s6 shapers .but they look like a great shape .
thrusters do come of the top better ,but enjoy the drive better, of the quads...its a style thing .