I have bought a universal sunroof and intend to fit it to my Corsa B.

It is an aftermarket item intended for the older cars with the softer or thinner head lining.

My concern is how to finish the job neatly inside the car, as the roof lining on these modern cars seems so much thicker and more solid (unlike the older cars,where the roof was thin and headlining could be easily trimmed around the sunroof rubber)

Is the roof lining on modern cars too thick to accomodate these older sunrooves and would you advise against tackling this?

Another concern is that with the pre-stressed thin steel used in cars these days would it cause a weakness to cut into the roof?

Any advice would be appreciated

Thank you

Ian