after watching the John Riegger Basic/Acquired Motion videos

[noproblemos]

Great videos.
It motivated me to go back and read through the other threads on Basic/Acquired/Total Motion.

Questions:

1. Why are we supposed to line the ball up towards the toe of the clubface at address?
2. When I'm practicing with dowels, and I'm starting to trace my plane line with the dowel and right forearm, how long does my right forearm stay pointing to the plane line? Doesn't it come off the plane line at some point on the takeaway (even before the right forearm gets to 90 degrees)? How about on the downswing, when does the right forearm get back to pointing at the plane line?

Thanks