Not sure if this is useful or in the right forum, but I have been experimenting and dicovered the following. If you apply the walk designer, and you get a spastic leg jerk in some frames, the way to fix this is as following: Turn on IK, set shin side to side to 0, then select thigh side to side and turn the dial, it doesn't matter how far you turn it, becuase the IK prevents it changing, and then turn off IK again. The spastic leg jerk is then gone. The problem is you have to do this fooevery frame in which the leg jerk or twitch happens. Is there an easier way to fix this, or has someone written a script to fix this.