well finding the leak is proving to be a pain, not the rudder.
More water, seems it may be where the sail mast comes thru, the white cap underneath the boat.
Why are some 09s covered by warranty? There are instances where Hobie gives warranty consideration, they have a history of standing behind their kayaks.
I loaded the kayak with water and there is definitely a slow drip from where the support mast comes thru and is capped, I'm sure when my 220 sits in it the water tends to get forced into the interior.