Originally Posted by
mwatkins
... A Seattle builder, Dennis Bushnell, crafted us a custom tandem built with a short seat tube, sized such that a 5 or 6 year old could reach the standard stoker crank but also such that my 5' 2" wife could stoke comfortably with a switch in seat and seat post. ...
I believe Bushnell also built my Counterpoint Opus II. The stoker position on that, too, allows for a wide range of riders; my daughter was, at first, almost too small for it. She had to have a pillow on the seat to push her farther forward. I can fit a tall rider on it if I put on a longer chain.