Audio cassette GOPRO mount

Printed a final CD slot phone holder for our main car (after several prototypes and big mileage of filament), for our old car with audio cassette I wanted to create a standard mount (GOPRO) and see later on for the position, angles and types.
The cassette is 8.5x 64x100.5, and the Gopro triple mount is drilled and fie for M6 bolt and nut (12mm instead of 10 for the head to suit any printing quality;
If the cassette suits, the rest will follow...
Find the STL file and the FREECAD file befo