I've been considering upgrading my Tuscany with Shimano Ultegra triple 9 speed to the Ultegra 10 sp. I already have a FSA triple crank that is 10sp compatible. I know I will need a 10sp chain and of course cassette and shift levers. My question is can I use the Ultegra 9sp front and rear deraillers (6503) with the 10 speed upgrade? Thanks.