Thank you very helpful. Trouble is the toughened glass is just about the size of the hole. <mm difference.
The original seal is very fine. Hopefully pics explain.
![[Linked Image]](https://tm-img.com/images/2026/03/05/IMG_0377.jpeg)
You can see how the lip has perished on the little bit still just there. Plus some of the bits with the mastic gun to show scale.