Well its been awhile since Ive been on this site and I think now..w/ this question, Im comin back. The scrog is the shit. I will always grow w/ a scrog or sog from now on.

To answer your question, The biggest part is constantly training the man stem further and further away as they strech. Then you take those node growths and train them up into the screen. The main point is to keep the canopy even. You do this by keeping the "main" bud sites even the internode growth bud sites. But, You also want to cut the undergrowth and weak node bud sites to let the larger ones thrive. If you do this right, about 2-3 wks into flower you will have a perfect even canopy w/ all the buds at a even size.