Hamlet's thinking of Rozencrantz and Guildenstern in Act 3 of Hamlet with examples from the play??

Hamlet has had it with his two friends. He knows their concern for him, in large part, is to gather information for the king and queen. Hamlet knows they are using him to gain favors from Claudius and Gertrude. In act 3 sc 2 Hamlet uses a metaphor to challenge Guildenstern's concern over him. Hamlet compares the playing of a recorder to the playing (manipulation) of him.

Why, look you now, how unworthy a thing you make of me! You would play upon me. You would seem to know my stops. You would pluck out the heart of my mystery. You would sound me from my lowest note to the top of my compass. And there is much music, excellent voice, in this little organ, yet cannot you make it speak? 'Sblood, do you think I am easier to be played on than a pipe? Call me what instrument you will, though you can fret me, yet you cannot play upon me.