Depends on wind speed and heading you are sailing. Basically... distribute weight to balance the boat. They will need to move depending on heading. Typically more aft as you sail downwind in breeze to keep the bow from digging in. More to the weather side when windy. In lighter air... distribute weight evenly. When tacking, it is easier to tack with weight more aft. If all are forward, the bows don't tack across the wind well.
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