Nekadesh and Nakdishcha

Hi,

One should use the text of Kedushah that the chazan uses, whether Nekadesh or Naaritzcha, but one who does not do so is not violating "lo titgodidu" since this is not an individual's prayer.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 37:5)

Have a great day,
Mordechai