Hey Dara999,
Sounds like he is one amazing little guy, eh? I bet he just magnificent! I love cobalt ringnecks.
Sounds like you're off to a great start with taming. I don't think you're little guy is bluffing, but rather just nippy at the moment. It should pass just as long as you ignore it and only reward him for the behavior you seek. Bluffing is right after weaning when the baby is more independent.
You're in for such a wonderful journey. I have three pet ringnecks in my life that I love dearly (2 IRN 1 ALEX). Truly, they make my life complete.
Anyway, just wanted to welcome you to our little family here on the web. We can't wait to hear about your progress with your little monster! :OP
Best wishes

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IMRAN-C