The file 'Upside Down McLaren Lego 42123 Mount 3D Printer Model' is (stl) file type, size is 8.2KB.
I used it for just one side so I could rotate it a bit and have it at a bit of an angle.
It is a bit finicky mounting upside down as you cannot see what you are doing very well, but it mounts and sits nicely. There is enough space for the wheels to the surface.
Guess it can also be mounted vertically to the wall, but there are other mounts can be found for that specifically as well.
quick_upside_down_McLaren_42123_mount.stl | 29.6KB |