You have to be very careful. Protect the headlight before starting the installation.
I made a scratch in the black paint of the headlight ring when the left side lowered while working ont the right side.
That ring will have to be painted again.
Adjusting the windscreen takes a lot of time to get it well done.
And don't forget BMW is now proposing an aluminum windscreen too, quite the same price as the Rizoma one ... but not so nice looking.