5 wks since the switch. Organic Scrog - to flush? and some more crunch time questions

I was feeding them organic nutes throughout the grow. I got the plants in agro soil (some dutch soil), used plagron alga grow and now the bloom.

First thing, its difficult to flush a scrog so i rather avoid it.
the guy at the grow shop told me there was no need. but in the net a lot of people say you should always flush.
Is it worth it to go thru all that trouble?

And when should i stop feeding with the bloom nute?
If the description on the seed package is true i have 3 weeks left. Some say stop feeding for the last 2 weeks...

sorry if this has been asked before...

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thanks a lot man! from reading the posts i'm not going to flush, maybe if i didnt scrog i would try an experiment.
And someone in that thread mentioned he feeds the plants til he chops them.
I'm wondering if I should do the same or stop a week or 10 days before harvest.