I don't completely understand. Could you say that in a shorter version..?
16 years ago, Obito used Kurama to attack the Left Village. Kurama size was huge.
Minato knew that the masked man Obito will create chaos in the Shinobi work, (Jiraiya's mission).
So he extract the "yang" chakra into Naruto. The size will be smaller, maybe half size.
With Kushina help, Naruto extracted some of the chakra from Kurama and put into another section of his body. Naruto notice that Kurama still had plenty of chakra, creating a huge TBB.
Kurama may run out of chakra, after using it for the TBB.
Tailed-Beasts is about Chakra. Kurama look just like Naruto using SM to gain addition power.
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**Just to share some infor. This is just my understand of Naruto manga.***
The 9 separated tailed-beasts were created from the Chakra of the Ten-Tails demon.
SO6P used his "Creation of All Things" ability to split the monster into 9 tailed-beasts
Current chapters show the Ten-Tails monster "shell" which contain the Chakra of tailed-beasts inside, extracted from the Jinchuriki. The Jinchuriki inside the Ten-Tails were the shell of the tails-beasts.
Initially all the tailed-beasts are smaller size.
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Many many Years had passed since SO6P had passed away, and these tailed-beasts will grow in huge size.
*Compare Kurama - (a) when Obito used Kurama to attack Left Village; (b) current size, in Naruto's body.
Minato was intelligent and also knew alot of information, apart from the knowledge of seals, etc; from his wife, Kushina.
When Obito extracted Kurama from Kushina, and used it to attack the Left Village. From this instance, he knew what the future lie ahead. This could be due to Jiraiya mission from the Toad Chief (also to live a very long live and great amount of chakra) about the future of the Shinobi World.
**In any living things, include human and animal, there are something called "yin" and "yang". Both must be balance or equal. "Yin" represent - dark, hell, shadow, etc. "Yang" represent - light, goodness, etc. If one had more "yin" than "yang", he/she will be "Evil".
Uchiha's eyes. Itachi sent Kakashi to hell.
Sasuke is in Darkness. Gaara told Naruto, after the 5 Kages meeting and the fighting with Sasuke. Gaara was also in Darkness, until he met Naruto.
Minato sealed the "yang" of Kurama's chakra inside Naruto. He used the "Dead Demon Seal" to seal the "yin" of Kurama chakra inside him. As both "yin" and "yang" must be balanced, so in actual fact, only half of Kurama's chakra was sealed. Using the "Dead Demon Seal" was to prevent anyone getting access to the "yin" chakra of Kurama.
Since Kushina was a Jinchuriki and of Uzumaki Clan, she had taught Minato about the Sealing method. Minato put some of Kushina's chakra into Naruto, so that she will able to help Naruto to have some of Kurama's chakra.
Kurama could still have gain "yin" chakra - because he is a Demon itself. And this "yin" chakra could create the "Evil" Naruto.
Naruto destroyed or overcome the "Evil" Naruto, that was created by Kurama.
So, the "yang" is more than the "yin". Kurama finally accepted Naruto..............