There was a very knowledgeable poster on golftuitiononline.com named Ted who went by rotator. He used 4mm quite effectively and was able to give some good insights into the method. Wish I had a way to contact him. He wasn't your usual poster in that he was always helpful and never a discouraging word about anyone.
The difficult thing about Dante is it seems that no one teaches it and the only discussions on message boards are infrequent.