I wanted to mount the Asus to the wall with a minimal gap between wall and Asus. After removing the 4 screws from the stand, i found out that there were 2 M3 female threads available with a distance of 80 mm between them.
For that i bought a M3 thread end and drilled 2 x 6 mm holes through the wall.
The part to which the old stand was screwed to, was sticking out 10 mm from the back of the ASUS. But since i didnt want to make slots in the wall, i decided to glue 10 mm high shock studs on the back of the ASUS so that any pressure resulting from pulling the ASUS towards the wall by the 2 M3 thread ends was divided equally across the whole surface.
So in the end i finshed the mounting by drilling 2 x 6 mm holes and 1 x 15 mm hole (power supply). It feels rock solid, it is attached as close to the wall as possible and the costs were only 4,40.
Here some pictures: