Board Thread:Naruto Discussions/@comment-31810758-20170423045127/@comment-25122992-20170423085554

I see no sense in such a question at all. Basically, Madara's/Sasuke's EMS is their own MS from the point they awakened it through Izuna's/Itachi's eyes respectivelly. So, accessing EMS = accessing MS for them, just in more powerful form and without usual MS drawbacks, as Vladosaurus poined out.