[Mathew]

Now I am getting confused. I thought that we were supposed to trace the straight plane line with the #3PP.

When I practice with flashlights I trace the plane line. This line for me is parallel to my stance line. I direct my thrust along this line, which is usually straight at my target.

Now I read that the right arm straightens toward the plane line and not the target line. Can't those lines ever be the same?

I was under the impression that they could be. So it could be possible to trace the Plane Line and Target Line all at once because they are the same.

Show me the light.

You always 'swing along' the plane line - you don't always 'swing along' the target line. You only 'swing along' the target line if the plane line and target line are for all intents and purposes, the same...