On of the biggest pit falls of the circa 1938 twist-lock design is that it is nearly impossible to gasket and keep dry. This can be an IMPORTANT consideration when installed just feet from a salt water environment. Corrosion is a direct contributor to HIGH RESISTANCE. High resistance is a DIRECT CONTRIBUTOR TO BOAT FIRES!!!!
Due to the design this system can be very well gasketed in order to keep it as dry and corrosion free as is possible.