Here is my setting for TrackIR 5 with TrackClipPro. The emphasis is to get an optimized result causing no fatigue to eyes.
• Speed = 1
• Smooth = 50
• Roll Motion = Disabled
• Precision = OFF (important to get smooth movements)
—Center = Ctrl-F10
—Precision = Ctrl-F11
—Pause = Ctrl-F12
Positioning the first two dots on the same vertical line renders the best result.