Here are a few more items.
If you don't have the hobie catalogue then go to hobiecat.com for pictures of the rudder assembly. When I bought my h14 the rudder system was really jury rigged. the tiller connection system had been replaced with a couple of rusty 1/4 inch bolts. The hobie catalogue shows a replacement kit for $11. It looks like the same one I bought. (cat. no. 3052)
If the rudders slop around in the lower casting then a rudder stiffening kit for $6.25 (cat no. 136) will help.
You can fabricate those washers yourself if you wish.
Another thing: The tiller assembly can be mounted improperly on your cat with the left side on the right and right on left. This will cause your rudders to be seriously out of allignment.
I believe you can find a lot more about rudders if you try the search feature on this forum.
Greg
H14,H16