After acquiring a new router, I found that it was not suitable for mounting on a wall.
It is somewhat of a mystery why Netgear has chosen to put the mounting holes so that the router must be set up side down.
Netgear has not saved on the angles so the orange holder on picture 1 is the test holder to get the right angles. picture 2 is the router with four, holding in black.
The holders come in four versions: side, bottom holder and in 15mm, 25mm wide.
I myself prefer 25mm and they must of course be printed in black.
The side brackets are mounted with 235mm spacing, bottom bracket with 115mm spacing and 95mm below side holder. see picture 3.
The holders are attached with 3.0 mm countersunk screws.
any brand ABS / PLA / PET-G