I noticed I didn't placed any pictures of the RPLidar A1 mounting method:

I removed the original screws of the RPLidar and inserted new ones that will dissapear in the lasercuted plastic panel. The thickness of the plastic panel is 8mm, this is a critical thickness because the laser eyes of the lidar sensor should not be covered by the plastic panel. Maybe I will still have some negative influence with the reflection of sunlight on the panel.... but for now just give it a try.