I have a Dahon Boardwalk . It has front V brakes and a coaster brake hub. I want to install rear brakes so I have both front and rear brakes and do away with the coaster brake. Like to able to pedal backwards freely when it is standing still so I can orient the pedals where I want before taking off. Is there away to modify the coaster hub and do away with the brake so it can turn freely backwards ? I imagine I could get a new 20" wheel with the hub I want but don't want to go to this extreme.