In the early days before the fog was lifted by Lynn, the word 'sustain' gave me a bad concept. It meant to me that I had to keep something, namely accumulator lag. I didn't understand that it was keeping a constant pressure against the shaft. I thought it was keeping the clubhead behind. It was a bad concept for me.
Me too YodasLuke!!!
When I first got into golf, I thought lag was accumulator #2 maxed out! Boy was I ever wrong!