My Ugly Junk- Corona Mill Station...

[mtnagel]

I looks ok, but no great. You can go finer. In my experience it is best for biab to set the mill gap as tight as still possible to run. This looks like it is not as tight as it gets.

I agree w @Miraculix
Make as certain as you can that the two grinding plates are parallel so grains can't escape one side or other being less ground.
The plates should clack/rub/touch when turning without any grain

Ok thanks both. They definitely made noise without grain.

But I ended up with 84.5% mash efficiency. Guess my brown ale will be a bit higher ABV

Then again, if it works for you, consistently, repeatably, with a brew house efficiency you find satisfactory, then I feel you are good to go.

That is true. Cheers!