I finally got oxygen and gravity in my factory hall.

After much finessing and hardship, I finally got oxygen and gravity setup. I had to go trough every corner of my hall to make sure that every block had another block either adjacent to it or diagonally to it. And after a bunch of head-banging against the wall -- tada!

another view For me this did not show up as the post image, so here it is (maybe for a 2nd time)