As said to date it's the individual not the style ,ive studied Shukokai for close to 20 years ,and have studied with some great Karateka in that time ,ive raised questions re the double hip ,hell it works OK , but when i question the need for it i am met with silence and a look of "shut up"! , i dont mean i misunderstand the technique ,but i question the need , why not start in the full re coiled pre punch position in a fully relaxed state instead of double hip ,witch in effect is a pull back prior to letting the technique go ? . sorry to spam your thread but i am a student of Karate -Do first and formost and always will be.