spinning is, in my opinion, 10% practice, and 90% technique. there's people in the upper 100-300 ranks that cant hit 400 rpms because they dont have the technique to do so... and that's because for them they never had a need to optimize their spin because they never farmed easy maps with all 4mod SS where spinning is the deciding factor on who gets the top score. Most of them are playing on maps where just accuracy and combo are the deciders...
Technique is important. It doesn't matter if you spent 10 years trying to spin fast with your fingers alone, someone like lncognito [who uses a mouse spin technique that makes his cursor draw squares around the screen to instantly hit 470] will always ramp up faster and maintain a faster spin.
Obviously im not saying you should try a full screen spin technique, that's silly, inefficient, and an extreme example of spinner speed min-maxing, but generally you want to use your arm to spin for the speed, if you're just using your fingers and wrist to spin your mouse, you will never have a competitive spin, but you should be able to hold 300, which is just about the point where you'll probably never have to worry about improving your spin anymore.
