To scrog u need to bend the limbs sticking up out of the screen and make them grow under the screen so they grow horizontaly under the whole screen. That way you get more light at the lower leaves and more bud sites. I'd also get a thinner screen like chicken wire, the one ur using is cover too much of the leaves and may cause problems if you keep growing out the top of it. Looks like they are growing great I'm doing a cfl aswell mine seemed to be a bit slower than urs, looks like it gonna be a good grow but chicken wire will help u get them big and bushy.