What a fascinating post!
So, as a coordinated righty(not so much a lefty as my recent bowling tournament results would say) and a person who was a heck of a strong stick tee to green, I have found new balls, clubs, technique variations fascinating and intellectually challenging.
As a medium height individual and a long hitter in my prime, I sought a swing action that was Tom Watson-ish, a strong swoosh with an upright follow through of the times! Very successful at it I was with some great scoring rounds and consistent very accurate drives over 280 to 315 in the summer with Laminates driver heads when that was a big deal. (Many many many moons ago).
I believed power was generated with a Double lever system of creating angles and retaining them while using forearm rotation through impact as hard as I could. Similar to the Hogan method all learned in one valuable 30 minute never forgotten lesson.
Fortunately due to winning a local Club championship I was sent to play in our local PGA tour event with a young and upcoming rookie pro named Dan Pohl(runner up at the 1981 Masters). At the time he was ranked at the time as the longest hitter on the PGA tour at ONLY 280 yards per drive. I had seen him play in the NCAAs the previous summer and knew that his length for the time was out of this world!
Fired up as an Amateur, I was disappointed that we were sent to play off of the Amateur tees and could not get to hit side by side with the pros just to compare. At the 12th I killed one out there near 300. Dan from 30 yards behind me was 5 yards behind me.
About 245 to the green he hits a 4 or 5 iron....WOW! I hit my 3 wood up 12 feet from the hole putting for an Eagle! I am psyched.. But I say to him, "5 iron?" Yep!
At the end of the round after a bunch of 330 yard drives and a bunch of 4 woods off the tee mixed in which I got to watch of the Massive hitting and straight hitting Pohl, I asked him, "Dan how do you only average 280 off the tee?" He said, "you see all those 4 woods I hit?" Yep! "Well the pro tour has half of those little doglegs as measurement holes! I average 280 with a 4 wood at least in the summer!"
The LONG hitting Pohl using a 43 1/2 inch driver was extremely straight for such a long hitter, almost not curving the ball at all, to maybe a 5 to 10 yard fade!
Back to today, Playing with hardly any backswing wrist cock, similar to DeChambeau, Pohl then added wrist cock as he started down to create what I call and what Art Sellinger of the World Long Drive tour call the Double Lever Swing. I don't see that in DeChambeau, but I note the extra length in his drivers and his greater height than the 5'11" Pohl.
At this time I believe he could actually easily add another 30 to 35 yards further if he added the Pohl increasing wrist cock. But in all reality he is hitting quite far enough for today's courses! And based on what I saw quite high and quite straight enough!
Take Care,
Luckylefty