You can choose to trace or cover the plane line. But you can not do both at the same time. Tracing and Covering are mutually exclusive because when you visually cover the plane line with the club head the shaft will not point at the plane line. It will point inside the line.
Covering is beneficial to a Hitter. Tracing is beneficial to the Swinger. I would try both.
Swinging (Tracing) and Hitting (Covering) will also give the #3 Pressure Point a different feel. When Hitting the #3 feels like it stays behind the shaft. When Swinging the #3 feels like it moves to the side.
Atleast, that is my understanding. Hope this helps.
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