Dagger has apparently put together clear instructions with photos to install the rudder on the Drift (and possibly other models). This according to Outdoorplay.com, from whom I bought the boat.
However, it may not be just a matter of instructions. The rudder kit seems to be an assortment of parts, possibly, for the Calypso model. I had a local kayak shop put on the rudder, and the technician reported that he needed to add cable, cable holder brackets and and a few other minor bits of hardware to get the kit to fit on the boat. He was able to figure it out only because he has done dozens of rudders. I would have gone nuts.
We found the Drift to be very stable, fairly fast for a wide recreational Kayak, tracks quit well, and big enough for two adults to enjoy with camping gear, and realy quit easy to turn. When in strong cross winds a rudder would be very nice. You spend alot of effort and energy keeping your course in the wind and after several days it adds up. Dagger really needs to develop a splash skirt for the Drift. With water at 45 degrees at Shoshone Lake you need all the help you can get to prevent swamping. Let me comment on two other item that Dagger needs to improve on the Drift. THE FRONT SEAT WILL NOT STAY IN PLACE WITH THAT MICKEY MOUSE SPRINKLER PIPE THEY PUT ON WITH A SCREW. SECOND, THE DIRECTIONS TO MOUNT A RUDDER ON THE DRIFT ARE REALY HARD TO FOLLOW. DAGGER NEEDS TO IMPROVE THE INSTRUCTION FOR MOUNTING HARDWARE. POSSIBLY MORE ILLUSTRATIONS WITH BETTER VERBAL DISCRIPTION MAY HELP! If it were not for the front seat and the terrible rudder instruction I would given the Drift a rating of 10.