Perhaps the use of cushions means blocks or pads. The rub rail and lower spray rail can roll slightly on a woody as the slings are tightening and takes up the slack and break away. On a fiberglass GB, these are integrated and part of the laid up hull. On a woody, these are bolted on and may shift or break away. I always have the yard use carpet wrapped wood blocks or "sling pads" immediately below these rails to keep the slings from causing any damage.
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