After leaving ot overnight, the next day I did go over the invisiframe again and pressed down some edges.
With the Amflow, it kept coming up by the rear brake caliper. Eventually after a few days of this and having to try to clean dirt and dust off the underside, I cut another small strip and wrapped that over and it's stayed down since.
On my Levo I had no issues and it stayed down first time.
It's not difficult, it's just time consuming and can be a little frustrating and the cleaner the environment while fitting, the better.
I even tried making up an iso alcohol solution and using a hairdrier.