Questions on swivel and flying wedges

[tongzilla]

Yoda,

1) what’s the difference between a turn/roll of the left wrist and a swivel?
I know that hitters have a gradual turn/roll and swingers swivel. So am I right in saying that the difference is in how sudden you turn/roll it? i.e. a swivel is a more sudden turn/roll, whereas a hitter’s turn/roll is just a gradual one.

2) is the term “true rotation” synonymous with “swivel”, i.e. they can be used interchangeably?

3) I am a swinger, and I’m not sure how quickly I should turn my wrists on the backstroke. For example, when I reach the first parallel on the backstroke, should the clubface be square, or slightly closed?

4) When you talk about turning the wrists, is this achieved only by turning the wrist itself, or does it refer to the turning of the whole of the forearm (or both?)? I hope I’m not getting confused with fanning, which is just a clapping motion and has nothing to do with turning (?)

5) Question on flying wedges. I know that the right wrist should always be level (no vertical plane movement) and is only allowed to bend (horizontal plane movement). But looking at photos of numerous pros at impact, their right wrist seems to be uncocked. Shouldn’t it be level?