I could say great swing! But that's not what you asked for- so here's my "internet" feedback- probably worth as much as the price you're paying.
You definitely want to have a vision of where you want the movement to be- in order to consistently guide you on your pursuit. The fact that he's not hitting his driver well now- isn't really a good reason to look for "what's" wrong. Anotherwords, it's not one tip here or another there- that will get you to where you need to be.
Minor points/observations
Driver stance looks a little wide, ball is extremely forward, and the toes of the feet appear to point not perpendicluar to the target line but angled "away" or behind the ball (to the right of the ball from the player's perspective)- possibly a subconscious adaptation to help prevent coming in "over the top"- or "too high and outside".
Major points/observations
The slow motion down the line sequences are the best to see the issues. The start down is not enough down, at impact the hands are not low enough and the right forearm is too high. Need more waistbend at setup, steeper hand swing during startdown, lower hands at impact, retain the waistbend through impact and into the follow-thru, which will help get the right forearm on plane. With a little more waist bend at set-up and a steeper start down while trying to direct the hands to a lower location through impact- I think you'll see a little better hip slide and the right heel rolling up sooner in the movement but that may take time to show up (just remember that the right heel motion would be an effect and not really something to work on directly). When you come down with the hands more out than down- the right hip doesn't have to clear and the right heel doesn't have to roll up as soon.
Great swing! (not Hit)
Mike . . . Maintain the Identities???? You got like 70. Are you off the pills? But you do better analysis off meds.
12 Piece- By now I'm guessing that Bam Bam and Bagger Lance are closely related cousins to you- Because no matter how much I PM them to have you banned from this site- you continue to exist! Further evidence - Bam Bam, Bagger, and Bucket- doesn't take a genius - you know what I'm saying
Oh ya- and how's the game? Fo Shizzle!
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Life Goal- Developing a new theory of movement based on Brain Science
Interests - Dabbling with insanity
Hobbies- Creating Quality
This motion is FANTASTIC!!!! This is definitely a Swing and not a Hit. This dude could be the poster boy for Wrist Throw.
I'm not sure I'd touch this swing too much . . .
Could the driver problems be a FITTING ISSUE? That's where I'd start. This dude has great alignments in my opinion. As Mike O said maybe a touch more waist bend could help him keep the Right Forearm on plane a little longer through Impact.
I love the Centered Arc and stable head. Love the Left Arm Flying Wedge alignments at the Top. The Sweet Spot, Shaft and Left Arm are aligned perfectly for Swinging and that great Wrist Throw he executes. The only other thing I'd say is that looking at his finish makes my back hurt. Maybe he could "release" his eyes to the target a little quicker to take some bend off his back?
My best guess is that he has a tendency to hook his driver, and if that is the case it is a result of not a lot of lower body clearing and a turned left hand grip. Personally, I would keep the lower body movement the same and turn the left hand about half as much.
Matt
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"In my experience, if you stay with the essentials you WILL build a repeatable swing undoubtedly. If you can master the Imperatives you have a champion" (Vikram).
The reason you can't sustain the lag is because you are so eager to make the club move fast (a reaction to the intent of "hitting it far"). So on a full shot you throw it away too early, which doesn't happen for your short chip. (bts)