I would have to agree with strange magic - being in the explorers camp we have always had rudders though we use them less than 5% of the time we are on the water. We've always considered them a trim tab to be used when more corrective strokes are needed than we find to be fun. If we're playing along a shore the "trim tabs" are always up as they actually impede our ability to turn quickly.
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Michael Collins
Sea Kayaker Magazine
michael@seakayakermag.com