Same problem for me with the short irons....
 

Smooth,
I had the same problem; pulling the short irons only. Turns out that I was bending the left wrist at impact (ok, the problem that most ams have). This after a year of working hard on FLW and BRW. But, in my case (and maybe yours) it was because the short irons are the heaviest, and therefore the breakdown becomes "easier". Also, (again in my case) because we think "it's just a wedge" we sometimes don't finish the swing, and quit. What finally worked wonders for me was to make sure I finished the swing, along with a determined roll of the left forearm, a horizontal hinge.
Tom

Study 3F7A.

I’ve read through all the posts in this thread and see that nobody has really addressed the root cause. OTT is caused by inadequate weight transfer. With the feet touching (as a drill for balance) OTT is almost impossible. Once the feet are separated, we have two axes (plural of axis) to deal with, the backswing axis over the right foot, and the downswing axis over the left foot, separated by the weightSHIFT. Starting the downswing over the wrong axis invariably leads to OTT and other problems.

What's the root cause of the "inadequate weight transfer"?

anyone?....
Bueller?

Inadequate knowledge of the golf swing :(

Look at this weight transfer!
http://www.youtube.com/watch?v=Xy9GTAENiJA

Clubhead was movin up there.

Yes.

What's your point?

What is it Mike?

When i use the 'right foot back' drill i don't come OTT - i'm thinking because i can see a nice big alley way from the top back down to the ball (i.e. right hip is not in the way). Is this still related to weightshift? i think my OTT is subconciously avoiding the elbow/hip collision because i'm definately not intending on doing it.

When i think about the pivot or weightshift however i tend to get to much swaying and leg drive going on....