kamidemond
If he has all Minato's memories and knowledge of his techniques, then shouldn't also knows how to used Minato's sage mode? I understand that using this technique needs some TESTING and SLIGHT TRAINING since the mc don't have any "real experience" regarding of this technique, but it shouldn't be that long for him to familiarize and fully master it since he already has general knowledge of how its works base Minato's memories and experience. Even Naruto who's stupid beyond reason can master sage mode in just one week or above. Let's just hope that it wouldn't take years for the mc to master it because...