Knee bend and waist bend
Sitdown, squat. Use the ground for leverage. Sounds great in theory, but how does one do it? The only ting I can think of , and have experienced to a degree, is to be flatfooted at impact. However no one on Tour is flatfooted at impact. Everyone has their right heel pulled off before impact. So how is using the ground for leverage accopmplished? I don't detect a squat or sitdown in your swing ,Brian.
The proof is in the pudding. I think the amount of knee bend or waist bend depends of the size, shape, flexibility, etc of the player.
I try to keep an open mind, and I consider accuracy, power, will the swing hold up over several rounds, does the setup you experiment with lead to injuries. Every adjustment I make, I make to compensate for the fact that I am not a machine, but a live person.
As an example I bend me knees a little extra at address, so that I can gain leverage from the ground during the downswing.
I also do this because I am very inflexible and to get any powerful coil, I need to be a little bit closer to the ground during the backswing.
Of course Pro golfers like Tiger and Rory, do a bit of a squat to start the downswing, however when I try that, I do not have time to straighten back up before imipact and my knees shake and get weak when I try to recover from the downswing squat.
Since my ablility to activate muscles is rather slow, I have to preset the squat at address.
If you can increase your leverage from the ground up so that you can gain more clubhead speed and hit the ball more solid, then no one has the right to be absolutely sure you are doing the wrong thing.
Golf should be considered a level playing field for ideas and practices.For me to get into an athletic position I seem to have to bend my knees more than the average player. Because my torso is very rigid and non flexible, if I do not squat a bit more at address, it is almost impossible for me to create a powerful coil. My goal is to create a powerful coil can then use leverage from the ground up, to release that power.
Everyone has a different body with different limitations. If you do something and it works, do not worry that someone who has a golf teaching theory tells you that you are doing the wrong thing. If it works and you can do it without injuring yourself, then you have a swing that chooses you. We might not be able to choose a swing. However for each golfer there is a swing that chooses them at that time in their journey.
Good Regards
LukeDaniel