You can trim and still get some benefit. It's best to do it within the first week of flowering in my opinion.
Sometimes the stretch will screw you up in places you don't want but you can combat that with a mild LST.
Then why did you start this thread?
You clearly had your mind made up from the start. Should've started a thread about stabilizing ph or the basics of hydro instead.
Here's the last bit I'm going to say about this misinformation you have concocted inside your own mind. If you can't stabilize ph in soil, YOU ARE DOING SOMETHING WRONG!
DWC is going to chew you up and spit you out. Just being realistic.
First of all, dirt is reusable. You just add more amendments before you replant.
PH? If you run organic soil, ph is mostly insignificant. If you want to test the ph of your soil, you test runoff or buy a soil ph meter.
You also don't need to flush on soil if you do it right. I assume you're...
Yea. I use General Hydroponics. Any of that will work.
It lasts a long time though. The price you pay for your plants...
Don't like it ? Grow organic lol.
That'll fix them up. Most common error is when transplanting. A lot of people don't break the dirt out of the roots. After a month of waterings, the soil is compacted around the roots.
I would at least try to get an oscillating fan in a corner just as a preventative. Unless you can get that intake fan blowing across the canopy.
The rest sounds good though.