X2 and SX nozzles simply bolt onto the 650 pump. However, the intermediate nozzle that creates the trim lengthens the complete setup. This extends the mounting point for the steering further from the hull, making the need for the cable to be longer. I do not know if a SX cables will work with a X2 nozzle, but I do know I put a SX nozzle on my X2 and had to make a bracket to accomidate for the longer X2 cable.
You can get a good amount of trim from it. The X2 uses a very short cable that will not go anywhere near your handle bars. You cannot use the X2 steering cable, and if you choose to use the X2 trim cable, you are going to need to have a second cable that goes from the bars to about the fuel tank to connect to the X2 trim cable.
Hope that helps.