I decided not to top the GDP. I'm not a big fan of toppping indoor plant, I just chop lower branches to promote upper growth. I vegged my GDP for 5 weeks prior to flipping the lights. I obviously could have done it sooner but since GDP is a shorter, stalkier plant, I let them get about 20" prior to the flip.

Thanks for the props on the room Fad. It was a lot of work, but quality is always the highest proirity.