I just had a survey done on a '90 P34-2, which turned up more movement in the rudder than seems normal. Post seems loose in the tube, or housing, and rudder can be moved by hand 1" - !.5" at bottom when hauled out. Does any current or past owner have info on the construction of the rudder tube? Are there bearings, bushings or just a stainless shaft in a fiberglass tube? Any knowledge on correcting this looseness?