Tweaked the roof today following the '5mm gap at the rear' advice, and all seems fine - quick test drive is noticeably quieter than when collected (you think?) but there is still a small gap on the left front which I inagine will let in water as before.
Pretty sure this is just the seal being squashed for 16 years of soft top use; I've seen people bring their seals back to life with various products so will do that over the summer ready for roof use next winter.
I have left marks on the back of the car where the hard top was fitted too tight
but hopefully they'll polish out. Good lesson for newbie roof owners there, the locks should need very little force to engage.
https://z4-forum.com/forum/viewtopic.php?f=2&t=1433&p=20314&hilit=hard+top+adjustment#p20314
Pretty sure this is just the seal being squashed for 16 years of soft top use; I've seen people bring their seals back to life with various products so will do that over the summer ready for roof use next winter.
I have left marks on the back of the car where the hard top was fitted too tight

https://z4-forum.com/forum/viewtopic.php?f=2&t=1433&p=20314&hilit=hard+top+adjustment#p20314