so no new gears required?
Nope you have the changers on the stem just leave them there. They are easier to see and use rather than on the down tube. But you could change to a band on down tube shifter if you wanted to. But why bother?
Richmond here with drops fitted. Not as nice as yours though.
http://cgi.ebay.co.uk/VINTAGE-RALEI...d=ViewItem&pt=UK_Bikes_GL&hash=item335f6f3b4f