According to the O’Day 302 manual, no specific tension is provided for the stays other than “hand tight” followed by a test sail and taking the slack out of the leeward stays (port and starboard). Neither does the manual recommend much of a rake (3” at the gooseneck I think). The manual suggests these considerations are really only for the serious racer.
But I’m not happy with what seems like slop in my furler foil but haven’t yet found the tension I’m looking for.