Oh I get ya, following simple instructions is key to success..
But I guess the point I was trying to make was.... for example. My tap water is slightly alkaline 7.8 to 8.2, when I add my nutes it drops significantly to 6.8 7.0 range. Then with just 3-4 drops of ph down it settles at 6.2- 6.5. And it's not the same every time.
So while pre-making water bottles is a great idea, I wouldn't sleep easy unless I tested each one and made certain the ph was the right range.
But even with all that said, you present as a knowledgeable fellow, and I'm sure you have things under control.
Is it worth testing the finished product? Perhaps not.
It's just I had a problem with ph on my maiden grow, and now I'm super careful every time. Probably overkill but it's how I'm built.
See you in a week! Have fun