Hey SDO,
I have the Kalama 9'2 and 10' and run a Harley Ingleby thruster or quad set in both. For sure on the 10' I prefer the thruster set up.... quads just felt wrong.
For the 9'2, the thruster set up seems to have better maneuverability, while the quad set will generate more speed but feels a bit stiff when trying to turn. There are several of us in this area who have switched to the Kalamas and we are all running these fins.