Okay it was not really as bad as i expected, though something do worry me.
And that is the IR light on the cabin camera, as the back of my mirror will be in frame a good deal, maybe the camera will select a less optimal setting with all the light hitting the mirror backside close by.
Mesured horizontal from the top of my mirror to the windscreen i have about 26 CM.
The gap between the top of my mirror and the headliner are 6 CM.
So this mean there will still be around 20 CM from the cabin camera lens to my mirror.
But the camera i can see in my test will be able to see the entire cabin, or at least the faces of everyone in the car, with the mirror in place from the chest down are obscured.
I made a test with my GT65EX ( forgive the upside down image ) but you can actually see more than i expected even with the camera just a little offset on the windscreen, but in the video as you can see i move it further right to the inner of the two sunshade "hinges"
At least for a few days i will have to remove my mirror to get the full unhindered view of the cabin to be able to demo what it really can do.
Moving the camera to the Left side might only be a little bit better as my mirror are at a angle so the distance between camera lens and mirror will be a little smaller, but personally i dont think that will make any significant changes.
So if Zenfox want me to give it a spin i think i can make it work as intended, and with the mirror removed i can also make cabin footage in all its glory.
But now my cards are on the table, so i will leave it to Zenfox to decide if they think i can make something good with their product.
If so my GT65EX will have to go, but it will soon anyway, it have been functioning flawless for 2 years, and it is a camera i can endorse with no problem ( my experience and the brand service level )