Many in the audience will be experienced instructors who are invested in their own methodology. I suggest starting with 1-L Machine Concept.
Explain viewing the body as a machine concept and the three functions Clubshaft, Clubhead, and Clubface. Allow this to lead into Plane, Pressure Points, and Flat Left Wrist. I believe these concepts will arouse interest without threatening points of view.
Next cover the imperatives and essentials. To back it all up – Geometry of the circle!
Good Luck
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Archimedes suggested,Give Me A Lever Long Enough and I Will Move The World.
In my humble opinion the bent right wrist is the most important aspect of the golf stroke.Without it you have nothing...all the power is gone before impact and this leads to throw away.This to me is the primary reason for another great problem...over acceleration.The body does this to compensate for the loss of power storage which is cause by straightening the right wrist before impact.
In essence the Golf stroke is all about power storage...The bent right wrist allows the golfer to do exactly that.
How about including the progression from Basic to Acquired to Total motion? Seems to me that would be very accessible and is a great way to start out students. It would be a great example that would be instantly applicable within each pro's own teaching.
As someone who is an experience golfer but TGM newbie this would clearly get my vote. This is one of the toughest things to fully comprehend, but fairly easy to digest. I believe a lot of non-TGM teaching pros would benefit substantially from a better understanding of this concept.
__________________ Reverse every natural instinct and do the opposite of what you are inclined to do, and you will probably come very close to having a perfect golf swing.