Board Thread:Theories and Speculation/@comment-1512913-20150221101637/@comment-6769189-20150306050336

Sage-Kurama Mode being his strongest form at the time, makes sense because he didn't meet the requirements of SPS Mode(all tailed beast chakra). All that suggests is that he didn't have it during the last, but not the suggestion that he doesn't have the capacity to use it.

Where is Seleentaus reference because from what I read Kabuto used the cells to revive Sasuke, not implant them into him. even then the wording is a bit finicky as to whether he used the cells themselves or what he learned for them. Sasuke also never displayed any of the benefits of Hashiramas cells.