Also, the other thing I do when I'm printing something like that is make a frame of sorts so that there is an even, solid surface under my entire frame.
Like Andy said, I flood hard. I've been training someone and she was leaving a very uneven flood -- to the point that there was a marbling of ink on the screen. I find it's important to make pull and flood almost a continuous motion; don't pause and see how your print looks. Commit to it.