Throw a Nubster Fin
into your quad setup, if you're looking for just a bit more control and smoothness.
Kelly Slater popularized this type of center "guitar pick"
fin, after first using it during the Quiksilver Pro New York back in 2011.
We've even had some customers use two nubster fins as the rear trailers in their quad setup (instead of using just one as a fifth center fin).
Play around with it and have some fun!
Fin key and screws are included.
Lightweight honeycomb fiberglass construction matches perfectly with our quad honeycomb fins