I understand that. I think when people read the word Roll, they think Swivel.
To my thinking: The wedges can only roll and the roll is around the hands. Swivel can not be done to a rffw without cocking/uncocking the right wrist and can not be done to the lfw without bending or arching the left wrist. a "sound geometric" swivel can only take place upon disipation of the wedges- both arms straight. That being said- since we are all built a little different- there is likely "a little" cocking /uncocking of the right hand and a little arching of the left in most swings but it is compensated for well and goes almost un-noticed.
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