[neil]

If those arguing about what starts the downswing could agree on what ends the backswing, then I think I could enter into the fray. It would also help if those arguing about when the downswing starts would agree as to when the backswing ends.

I didn't realise we were arguing about what starts the downswing.
I was talking about the difference between the weight of the club (motionless) at the top ,and lag pressure.