Maybe it is a bad idea, but how about adding an S & S coupler to your BF frame for a quick(er) fold option..? I don't know if the NWT frame tube is a standard dimension. also for the retrofit of a S & S coupler you can get quite a lot of Dahon bike,.. so it may not be the best option. Just one of the options. I also feel the Swift and Brompton are very viable for commuting situations. The Swift rides better from what i hear and is standardized and affordable. The Brompton folds crazy small.