I am not familiar with the SN pole, however, it sounds like your cable mount might be the issue. The cable should be firmly mounted on both ends. The pump side is easy, because if it's not mounted right, you sink. However, the pole side is something you might have missed. The cable should be secured somewhere near the turn plate end, just onto the colored portion of the cable (The RN has a bracket that holds the end of the colored part using a groove in the end of the cable, while kawis have a clip that holds onto the actual colored part, not sure on RN). If you cable is not secured properly, then the steering simply pushes the cable until it binds against base of the pole or pulling until the tension is resolved (the slop is the cable moving inside of the pole). You need to ensure that when you move your steering, both metal ends of the cable move, but the colored (plastic wraped) portion of the cable doesn't move. It's okay if it moves inside of the hull, as long as the ends of the colored portion are firmly secured.
The other choice is that it is broken and popping out somewhere you can't see it. If it is securely mounted, you need to check it and possibly remove it to inspect for damage.
Very few other causes of slop will cause that much play, however, just to throw out things to check, verify the nozzle is mounted tightly and the ball joints have no play.