So I got hit by a car and ruined my derailleur luckily that was all that was broke. Here is my dilemma I also would like to get a new crankset. I would like to keep my shifters mainly I have XTR ST-M950 and if at all possible I would like to keep my front derailleur XTR FD-M970. I want to get a 10 speed XTR rear derailleur. Is it possible to keep my shifters or do I need new ones. Could I just buy the derailleur and chain for now and ride until I have enough money to pick up the crank I want and cassette. If any one could give me some advice on how I can get a 10 speed RD and piece the rest of the 10 speed parts as I have more money that would be great. My leg is finally strong enough to ride again and I cant wait to get back out there it has been nearly 4 months since I have been on my bike.