Micra C+C roof rattle when open

Good morning and thanks for accepting me as a new member.

We have recently part ex our 2003 Micra K12 4 door for a 2007 Micra C+C. Chuffed with it but roof rattle (creak) in boot when roof is open. Roof is solid when folded and nothing blatantly obvious. I would definitely say it is a creak rather than rattle. All ok when roof closed and no issues whatsoever. Would replacing the round rubber stops on the inside of the boot lid make a difference? Tried driving with boot partially open and sound still there so I know it’s not the boot lid and more coming from the folded roof. Any advice would be greatly appreciated. Regards Russ.