This is the hardest part for me too. The transistion is mush better than it used to be on French braids but I'm still having problems with Dutch and rope from time to time. I find that the transition is smoother if I change my hand position from a french to an English postion. I usually pause, take a breath, put all the strands into one hand to allow the other to change position and start again. I also find dipping my head forward a little helps.
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