@Bold, since when was rikudo chakra required to use or sustain the rinnegan? It's like saying you need a Uchiha chakra to use/sustain the sharingan while actually you just need it to awaken it (Kakashi and Danzo being prime examples)That's not the point. Only an idiot would believe that Sasuke keeps his Rikudou power-up and Naruto loses his. It completely invalidates the dichotomy established over 700 chapters. Sasuke can't even use the Rin'negan with the Yin chakra from Rikudou which lets him sustain it.
Madara created Hagoromo's chakra by mixing his chakra (indra's) with Hashirama's (Ashura's) just before his death he implanted the rinnegan into Nagato, who didnt bear any rikudo chakra, despite that Nagato still managed to use the Rinnegan to its fullest, another example was Sasuke willing to give his eye to Kakashi to unlock IT despite knowing Kakashi doesn't have rikudo chakra
Rinnegan doesn't require rikudo chakra while Rikudo mode does