Approved! He will have the ability create them and make them disappear at will but it will make him tired to do it multiples times in a row in a short timespan. He will also find that he is connected to this version of himself more and more the longer he keeps them active. He will feel what they feel. All physical sensations will be doubled for him and when they disappear, all memories they have will become his as well.

The longest they can remain "out" is twelve hours and then they will disappear on their own.