Hi to the Folder Posters here. Need some simple advice; am planning on acquiring a Dahon Mu Uno which is a single speed to replace my recently stolen Boardwalk. IS it much of a job to convert this SS setup to a 3 speed or 7 or 8 speed in the future should I decide to? How much weight approx would this add to the Mu Uno? Chances are may just decide to keep it a single speed but am exploring the options should I decide to go that route(conversion) on down the road in time. Thanks for any advice.