Skipping Bi-sefer Chaim

What is the halacha if a person is davening during the aseres yemei teshuva and the chazan is about to reach kedusha. Should he skip בספר חיים [before the final המברך את עמו ישראל בשלום] on order to get to kedusha or not?

If he started with the tzibbur then he should not because such a person has the right to daven for as long as he wants and need not rush in order to make kedusha. However, if he started after the tzibbur and the only way he was allowed to start is because he will finish before kedusha [if he will not be able to say kedusha with another minyan], the question arises if he should skip.

This requires a discussion....

[הגרא"ג הגרש"ז ועוד רבים]