I just finished printing off my poster on the printer so big, they call it "Tank." Fortunately, as it was printing, I only saw about 3 things that I would change. One was a colour issue: some data I had printed in blue came out a bit darker on print than it does on screen, so the data points were not as distinct as I would have liked. A second was that I probably could have used some colour in the graph I described in my last post to make the mean diamond stand out a bit more. Third, some of the spacing between text and heading could be improved.
But if those are all I'd tweak at this point, I'm doing better than average, I reckon.