Nice videos.
That is what I found useful about the Skypro device that we talked out previously. I appreciate that the Skypro is limited, and gets it's alignment data from the clubface position at address (which obviously can be open or closed compared to the player's real alignment) but irrespective of that I found it great at showing whether I was on the same plane going back and down. It doesn't matter where the SkyPro thinks you're aligned it still shows the club going up and down relative to a fixed alignment.
What I found in trying to achieve that same plane up and down is that for me, it felt like I was going WAAAY outside the line on the way up. It *felt* ridiculous and Jim Furyk steep. But the Sky Pro said otherwise.
The second point I will mention is that the pro golfers whose swings were recorded as reference swings on the SkyPro software were nowhere near the same plane up and down.
I mentioned this to my pro who said that in his opinion it matters not one bit what plane you go back on because the only thing that is important is what the club is doing into impact.
Take Ryan Moore for example:
https://www.youtube.com/watch?v=MBYZcHS7Ki0
His butt never points anywhere near the ball until he starts his downswing. In fact it's pointing behind him at halfway back!
Rob