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  • You'll want a pivot somewhere (even out bumps etc) but probably better to implement nearer the attachment to the bike. You probably need lateral flex too unless you're only cycling in a straight line!

  • Will I? I thought about this, but can't visualise quite why it is necessary; in effect I'm just making a longer bike. A tandem doesn't have any lateral flex does it (apart from what is inherent in the frame).

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