I use the analog sticks(I'm sure you have a good idea why) I find that if when doing this move and others like it(kano's vert roll, ermac's tks etc) that when you hit the down part of the command always try to hit just to the side of down, not diagonal though. It's hard to explain, I guess. Like for his spin, f,d,f,r Well on the down part hit it with just a little forward also. I guess you could call this "english" like when shooting pool. With the method, I can hit his spin 100% of the time. Just remember its 4 different button mashes, and do not hold forward when you hit run. You should be spinnin to your heart's content and others' demise then. 8)