The feel of PA #1

[Nemesisesq]

I just finished readign through the Golfing Machine and have already started my study of the material.

My questions are in regard to PA#1 Hand Path on the down swing and aiming point. I feel my best contact came when I felt my right hand pulling the club down from the top, I feel the pressure in PP #1 in the first half fo the down swing and then I loos the feeling of it it is possible the club starts to travel faster than my hand?

TGM says the hand path is "straight down" from the top. Does that mean straight down parallel to the force of gravity or straight down the swing plane?

Where is the aiming point supposed to be and how am I supposed to get there exactly.