Don't get me started on that area=1 assumption @OrthoDoc. I just don't see it. Anyway, did you look at that second post "Where to start on Flex Daily" and the final calculator pointed to from wsu ? It seems to cover your scenario.
I tried it for my garden which had evenly spaced emitters and wasn't crazy about the results, but I don't remember why. You might give it a shot if you haven't already. What I ended up doing was that I had a good idea of how long I needed to run my garden every day. Using the GPH for the line and the runtime I wanted, I was able to calculate the total number of gallons I wanted to put out (GPH * runtime in hours). Once I had that I went back to my original calculator and used the total number of gallons to get a PR. Does that make sense ?
And thanks for the kind words!