I have a 17 year old Raleigh Road Ace with a Reynolds steel frame. I wish to bring this bike`s groupset in to the 21st century ( currently fitted with Shimano 600 gear ). I have been made aware that I can have my rear drop-outs widened by a frame builder but I`m not sure this is totally necessary. I would probably want to upgrade to Shimano Ultegra 10 speed. Any advice most welcome. BTW as per the subject field the inner distance at the drop-outs is at present 130mm.