My new Spearfish is due in tomorrow, according to UPS, and it will be my first experience with a 2x10 drivetrain. I have been doing some searching around, but I haven't found much on cross-compatibility between Shimano and Sram. Are any of the parts interchangeable? (cassettes, chains, derailleurs, shifters...) I am most interested in cassettes at the moment, but it would be good to know about other parts for future swaps. Thanks