Harry is becoming more confident now that he has had time to settle in his new home and he is starting to assert his independence, this is to be expected.
When he goes to bite you need to tell him "No bite" in a firmer voice and then turn your back on him and walk away for 10 to 15 minutes, this he will not like for greys do not like to be ignored.
Another thing is if this new behavior is upsetting you then it is upsetting Harry too for he is reacting to your emotions, greys are very sensitive to our feelings, if we are stressed out then that stresses them out too, they pick up on our stress.
If you are trying to force him to do some things he does not want to do he will bite you, we have to be smarter and make them think they are in control when in reality we have the upper hand.
In reality you may have lost your cuddly Harry, a lot of greys love to cuddle when they are babies but they outgrow that trait and if he does not want to be cuddled anymore then you will just have to honor that.
Some of the other members will have some more and maybe better suggestions for you.