he did seal half of the kyuubis charka with in him and the reaper death seal so i'm not surpised that he can use nine tailed chakra but the chapter was better then i expected
i get that, its just that it wasnt THAT easy for naruto to do.. it took 2-3 chapters for him to finally make it, even with the help from bee and kushina.. And minato died right after he sealed the 9tails, so my question was more like: did he do it when he was restored as EDO or right before he died?