I have read that the double foot guides spread the stress over a greater area and so are stronger. Also the double foot stiffens a rod and makes for a different action than if singles were used. Single foot guides supposedly keep the weight down and allow line to shoot better. I guess the only way to decide would be to build one of each and see which you preferred. (Oh-Oh, this is starting to feel like a slippery slope!!)

Regards Mike

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It's not the fish, It's the fishing.