O Ch 53 (3) MB [9] says that after an individual finishes the פסוקי דזמרה he should go straight on and say ישתבח and not wait for the chazzan.
On Shabbos or Yom Tov, is it permitted to stop and wait just before שוכן עד (or at any other point before ישתבח) and resume with the chazzan or is one obliged to go straight on and say ישתבח?