hi guys ,how are you doing this is my sprint butterfly underwater footage (my coach told me my main mistakes are: 1-that my legs arent completely glued to eachother and sometimes one foot leads the other 2-my timing of the first kick is off i finish my kick before my hands finish the pull 3- he says i pause between the 2 kicks they need to be continious 4- my knees dont fully extend , is there anything else u guys notice which could be damaging my speed