[Yoda]

how exactly do the wrist hinge in the swing. i thought i understood this aspect, but after viewing my swing on tape, i found my left wrist, at the top, is slightly cupped, and almost every pro ive noticed is FLAT wrist at the top. Most are anyway, and this makes sense, becuase it is easy to get to flat left wrist impact...

I always thought, or read, that the wrist move up and down, as in, if you were in your address position, about to swing the club, if you just move your wrists up and down from there, thats how the they are supposed to move, and then that, coupled with a body pivot, gets the club on plane...however, this cant be true ive found cause when move my wrists in that manner i CANT get flat at the top..I always have to manipulate it conciously with the hands in order to get to the flat position...i know the pros dont do this manipulating so now im completely confused with how the wrists move...any help would be awesome...

The Left Wristcock is Perpendicular Motion from its Impact Condition (Flat), not from its Address Condition (Bent). Assuming a Vertical Wrist (mid-condition between Turned and Rolled), the Left Wristcock exhibits 'wrinkles' at the base of the thumb, not at the back of the hand.

To simplify, use the Harvey Penick solution:

Ball your fist and take it to the Top.

Add the 'wrinkles' and that's the way it should look.