Took a few tries, but I got there!
I am using the sneak preview on a banana Pi m1 literally bought yesterday for this purpose.
I downloaded the image, imaged an SD card and plugged it all in.... and got nothing.
so I pulled the setup from my server room (my wife is so kind to let me rename the cupboard the server & router sits in the "server room") and there were still some issues.
fearing a bad board on the banana Pi, I quickly took a raw image of a raspberry pi2 I'm using on a project, then wrote the eblocker image to it.
plugged this in, and everything was fine.
So I downloaded the banana Pi image file once more, unpacked it, reflashed again. plugged it all in again in the living room and everything except wireless devices were being filtered.
I need to go out at this point, so I disconnect the bpi & plugged it all in inside the server room again.
When I got home, nothing was being filtered again. I decided to swap out the power supply and I am now proud to say, its working on everything as designed!
Enjoying the product quite well so far.