Well, this is it then, my solution on dropping the M.2 temps in my system.
Before it was the Samsung 970PRO 512GB mounted on the rear of the motherboard, resulting in high 70's temps under load.
Now, with this setup, bringing the M.2 to the front using a ADT-Link cable, adding a EK cooler and actively cooling the heatsink, it results in mid 40's under load.
I am happy with this result.
Just waiting for a more high quality fan to come in and then I'm finishing up on the cables.
It is mounted using a 3D printed part strapping onto the PCI-E connector. This screws onto the ADT-Link extender and ads a mount for the fan.