My 71 P30 rudder/tiller assembly feels loose. I am assuming it is the bushings. Has anyone replaced them before and if so, have you done it without pulling her out? Secondly, I have a roller boom and the sail design is a bit interesting. Two crinkles at the clew on the main sail. I can only assume that the upper (which is about 10 inches higher on the sail) relates to a Cunningham assembly. The boat was poorly rigged when I got her, so I am having to kinda figure it out as I go.