Looking for a working Android Image with root

Hello, I am looking for a working Android Image that allows root access.

My BPi-M2 is currently running the (kinda buggy) 4.4 KitKat image, but I really need root access & did not manage to root it manually.

It is really bad that there is no such image available even years after the release of the bpim2.

Dear Mrpew,

Pls try below M2 android image that allows to root: