Ok, I think I'll be the first one who gonna make it. Dahon-folder as dutch-style bike.
At the beginning there was no problems with conception: complete upright posture, brooks 67 and moustache or another retro handlebar. But after a while I realised that if I put VO Left Bank handlebar on Radius_V handlepost, the post will get annormous leverage pressure. I'm not tall at all(5'3"), so there will not be a huge rase of stem. But I'm in doubts, nevertheless.
As an alternative I look after North Road.