I have a 9 speed Shimano equiped bike. A guy completed a deal with me by giving me like new Ultegra 10 speed STI's. My question will the right hand shifter work on the 9 speed knowing that I don't have that 10 cassette? Second question to change to a ten speed is it a simple matter of just changing cassettes or do I have to change chains and possibly triple crankset. It is FSA Gossamer with outboard bearings.