Sabre 30 chainplates cover
Actually those covers are a big reason why chainplates leak! All chainplates move under loads that constantly change. Those plates shear the sealant off the chainplate, causing leaks. Better to have a 1/4" gap between the cover and the chainplate all the way around. The same applies to the deck itself. If it touches the chainplate anywhere it shears the sealant off and leaks.