Got it. Thanks for the tip.
I found it. Sounds like a great drill, I'll try it today.
I understand what you mean, but "learning by doing" isn't working for me. I've been working full-time on my swing for five months spending about 30 hours a week on the driving range. All of it has been deep and deliberate practice. The biggest problem by far is that I can get my body to basically do so many things -- a lot of which produce results -- that I don't know what the right moves are. For example, I know about four different ways I can shallow my swing -- they all produce a draw with compression -- but I know that at least one of them is wrong because it involves deliberately moving my arms down and keeping my shoulders closed.
Someone else may have better results, but I can't stress this more: simply trying different things and waiting for things to fall in place can be very confusing and ultimately, extremely frustrating. That's why I'm here discussing this on a forum and not hacking away on the range!
Here's a video explaining my confusion with the transition: