I have a 1977 O'Day 20 on a small lake in S Western Pa I would like to fined a new main that is inexpensive. Any Ideas? Also Can I change the Back stay? I would like to move it from center of the transom to a split back stay. this will enhance the stearing because the back stay will not be in the way. Does any body now why it was designed this way and can I make this adjustment? Regards, Dan Marks