The best system was on my Porpoise II (one block at the masthead, one at the deck). But, like everything else, a maintenance item.
One unexpectedly failed, a Wilcox-Crittenden (which I wouldn't have expected ). 'Fixed with a cable-tie and Leatherman for the long trip back to home-base.
Stored with sunscreen, water bottle, small electric bailer, camera, Smartphone, chewing gum, 2-piece kayak paddle, and sponges through the "Ultimate Inspection Port". (UIP).