Mulleady, I don't know if I would classify it an upgrade...more of an experiment. I don't know if I will like it, hate it or go meh? I figure the fairing is a piece of transferable equipment that I can appropriate for other bikes if I don't like it on the Dahon. I've toyed with the idea over several years but didn't have the gumption to pull the trigger until now. Living in a rainy city, I like the idea of a fairing to aid against the cold and rain.
These are the only pictures I could find of a commuter bike fitted with a fairing on the internet (non-racing specific use):