Sorry to have to say this but scrog is supposed to be done as it grows.Your best bet is super cropping your girl.
Work the stem gently till the plant bends in half....don't brake the stem....it will heal and continue to grow flowers....I'd do this before flowering it.because once you put her in flower it's going to double in size...good Luck and your yield should be huge...I say 1 pound at least.

Don't just go bending stuff...read up on super cropping first or you just might break your plant in half.:thumbsup: