I'll post one more time on the spurious excuse that bouncing the topic may attract more answers for the OP, especially more pics. (BTW, my Ortliebs are on long-term loan or I'd have had some pics up already.)
I worry about worrying. I had a 24 hour blood pressure monitor fitted last week and every time it started inflating, my stress levels went up. It had to have two goes twice, once when I was trying to keep up with my 6yo granddaughter coming home from school, then when my natty Goretex flat cap blew off and I had to chase it down the road, ten minutes before I saw the nurse to have it removed (the monitor, that is, not my natty Goretex flat cap.)
It took me a lot longer than 15 stressful minutes to fit (Ortlieb pocket, that is, not monitor or NGFC) if you include agonising at each stage, making a more substantial template than the paper one supplied, deciding exactly where it should go, marking the positions of the holes, making the holes then the final fitting. That's all why I still remember it so vividly, but my tea is now ready so I will spare everybody more of this drivel.
Edited to correct an appalling spelling error: two/too