from what i have read, fluoro carbon line is invisible to the fish. if this is true, then what is the advantage to using 6x tippet over 4x. the reason for my question is right now i carry with me fluoro tippet material from 2x thru 7x. other than the smaller diameter being able to fit thru the eye of smaller hooks, is their really an advantage to using the smaller diameter material.

should i maybe just carry 3x and not worry about the fish being leader shy since they cant see the leader anyway.