Day #20 Update: Didn't look for a long time and roots are huge at this day, so they must been already Ok for transplant around day 12-14, at least for some of them, but still it's amazing to see this healthy, explosive root growth.
Will be transplanting soon to 1 liter pots, having them grow a little bit on a separate tent with a closer 450w Viparspectra, and then pick the best three to do a complete grow under 450w and the other 3 best to grow under the 600w Vipar (after harvesting the OG Kush).
I will be updating very soon with some after transplant pictures!