On the Dominator 6-4 RF (with futures fins) I had tried the stretch quad set (w/4.0 rears)and found it had too much hold to do loose tail-out snaps on small waist to shoulderhigh fun waves. (I sold that Stretch set)
I inserted the sidebites (@3.23 rears) were a little too loose, not enough hold when bottom turning or a quick pump for speed. they worked fine on a different board that is now broken already I am saving those fins for my kids.
My V2 F4 fins (w/ 3.75 rears) did not have not enough drive for a small wave. I might combo those into something else or (I am saving those fins for my kids.)
My Tim stamps quads (w/4.0 rears) work great down the line, but dont loosen up enough on the tail slides
I have not had the chance yet to ride the Rusty quads (w/3.85 rears) or combo them on the Dominator this season. Being the tail is wider i am experimenting with the rear fins to see what works best on the dominator and other boards. the Rusty Quad rear might be the answer. I am looking for drive and that quick release of the tail on the playful waist to shoulderhigh waves.
I am going to try the Rusty Quad set (the 4.54 fronts have alot of hold) or combo with the Rusty rears (3.85 rears) with the Stamps front fins (4.46 fronts) or the upright AM-2 (4.79 fronts) that big fin drive which may give more release.
I have not figured out how the knubster fin fits in to a fin setup and what combo to even start with.