Sammyboy- I was going on the assumption that the Dahon-licensed folding hinge design was SUPERIOR to the standard Downtube hinge. (Otherwise, why pay the licensing fee, especially for DT's low cost entry?) Is this assumption wrong?
FWIW I never had a problem with the Downtube hinge on my Mini, it does require tightening up almost every time you fold/unfold but that's no problem.