I won't repost here everything I have already said on this topic, just to repost links to images of my unflushed, but properly cured, weed and it smokes just the same as your flushed, cured weed.
I think it was even the same image you posted that I responded to.
Anyway, you are showing your weed is well cured, IMO the flushing is not so important.
This is my opinion on flushing
and here is the post where I posted the image of my unflushed ash
EDIT 3 :
Same here. This cycle the maximum I went was a TDS of 580 (EC 1.16) and they seemed to want it lower next time. Next time, I think I will see if they prefer closer to 530. The more I learn, the lower my EC gets, and the higher my yield and quality go.