Ideally sails should be rigged on exactly the right size mast so that not only is the curvature and stiffness right but also the diameter at each point of the sail is correct. This is especially important with inducers and cams which are designed to fit snugly around a mast of a given radius. If the mast is too large they can become hard to rotate and if the mast is too skinny they just rattle and leave the luff sleeve out of shape. More »