9'6" Naish Mad Dog x32 paddle waverider - Board tracks better when paddling and more control down the line
I only have been able to use the fins on medium, 6' waves a couple of times. Aside from making paddling nicer as one does not have to waste time switching hands to keep the nose straight every stroke, the board holds nicely on steeper drops despite the board's length. Takes a little more pressure on the tail to maneuver than the stock fins.
In small waves, the stock fins are better. The Harley Quads just hold a little too well when trying to maneuver from section to section in the mushy stuff.