I'd like to get your thoughts or using the many different types of swivels out there? Crane, ball-bearing, etc. Which do you use for wire or heavy leaders? Are the ball bearings necessary with some jigs and irons, or will regular cranes suffice? How about size / weight? I don't see the point of using a swivel rated for 200# if the wire leader is only rated for 50#. Am I missing something?