I was showing a friend some of the dowel drills you have mentioned in past posts. The drills have helped immensely in checking alignments and the setup of the flying wedges.
When my friend tried using the dowels it was readily apparent that his accumulators are releasing too soon. Due to the length of the dowels and his premature release, he was striking the ground with the dowels.
This additional benefit of using dowels didn't occur to me until I saw the problem my friend had. He was releasing accumulator #4 from the top of his downswing. After showing him what he needs to do, he went to the range and called me excitedly mentioning he wasn't hitting fat shots and getting increased distance.