If the stock Dahon brake noodle fits/is the same size as the Avid ones, then why jump through hoops doing all kinds of mods? Just re-use it. From what I've seen, the noodle is pretty generic stuff on the brake arm hook up end and angle (135° or 90°) or length and just varies in detail on the cable housing side on some bikes...in this case Dahon, which appears to favor using a ferrule on it's cable housings (sealed cable maybe?) instead of the more common housing insertion.