This is an update of my former instructable http://www.instructables.com/id/Row-pull-push-bike-la-marianette/
After a year of daily work and more than 1000 Km the hinge was wearing out making steering unprecise. So I decided to rebuilt the mechanism and try to make it even stronger.
Many people watched the original instructable last year but nobody told me about doing something similar. I hope this one helps somebody to try it. The bicycle is really fun and many interested people ask me about it in the street.