the one right system uses quick pins on the shroud lines. i have had no problems with them. i use stainless beaners on my cunningham and outhaul (clew). they have to be about 2 sizes larger to handle the equivalent loads of a shackle. the manufacturers publish the strengths for most of these parts. they do save me time when rigging and unrigging the boat. i do not use beaners on the standing rigging.