Rounder, deeper, flatter

[bcoak]

Any advice on how to get my backswing flatter and deeper behind me as well as a more rounded swing as a whole?
Hard to explain what I am doing right now, but I know I have to do the above. With my current backswing my only move is forward, either with a bump of the hips which drops the club behind me or my whole upper body goes forward and down. Result = mostly a slice. Played 36 this weekend and it was a pull one tee shot, slice the next, pull, slice, etc.
Tried on the last few holes to really roll my club and left arm open (FJ on my glove pointing skyward) and around on my backswing and then really release hard with left forearm to get to wedding ring up. Result was more length and a draw/hook.

 

[JeffM]

I strongly suspect that your slice problem is not related to a swing that is insufficiently flat/deep. It could be related to starting the downswing with an upper body move. However, I would need to see a swing video to offer rational advice.

Jeff.

 

[Brian Manzella]

Here's your Rational.

 

[bcoak]

Thanks.....analysis spot on

Brian, many thanks.
The part about the shoulder lag made perfect sense and that is exactly what I feel like, esp. the hip bump I described. Also, the part about right shoulder down plane was on as well. I just can't get there.I definately feel above the plane.
As you described on one of you YT videos, if I take my backswing and then keep my hands at the top and turn my body back to address position my arms move way out and over. Would this be another clue to me being above plane?
Would NSA help?
Again, thanks for taking the time to do a video and the time you spend here as well.