emilya,
I just let them grow up naturally and then trained out once they got to the screen.
In my opinion this leaves too much under growth to deal with, and in my case lots of small popcorn buds under the screen.
I was trying to trim the under growth, but there was so much I finally had to just let it go.
I was too afraid of making her hermie from taking them all off at once. By doing it slowly I just ran out of time. (Last real trimming was at about three weeks flower.)

In my newest log (http://boards.cannabis.com/hydroponi...2nd-scrog.html) I am trying out a different technique for the early veg training.
I am hoping that this will keep all the bud growth above the screen.

One other thing that I did with this SCROG was to stop training about a week into flower. My theory on this was to let her grow further above the screen.
It didn't make sense to me to have all the buds just a few inches above the screen.

Well I hope some of this helps you out. If not, thanks for listening.

Wishing you best of luck with your girls, and I'll be watching. :hippy: