Coincidence
I was at the range the other day thinking about counterfall and remembering Brian demonstrating it at the Anti-Summit.
The step on the right step on the left technique never worked for me but when I started thinking about actually falling into my left heel before the end of the backswing it suddenly clicked. I generated stretch, automatically got into a powerful squat position and the clubface closed easily - too easily, so a weaker grip was required.
I got home and saw this revived thread and Brian describing perfectly my previous problem - a down swing pivot around the back swing axis left me high and dry, with a too early axis tilt, under plane and struggling to get the club face to the ball.
Don't get me wrong this was scary at first because it feels so uncontrolled (remember Knudson: "Give up control to gain control"). To someone who was trying to minimize movement with centred head, centred pivot, blah, blah the idea of falling does not compute. But master it and your swing becomes almost effortless. I understand now why Brian considers the "modern" swing techniques harmful.
A final caveat: I would not have had a chance of making this work without first having mastered the lagging clubhead takeaway. You need to get right before you can fall left.
Drew