i run 6x6 rockwools on a coco mat, veg for 2 weeks then flower. i ran 28 on a 4x8 tray but next run im only gonna do 21, 7 rows of 3. I also am gonna use 6x6 cubes on rockwool slabs, top drip. The coco mat is just not enough for good root growth! I use cutting edge with bloombastic weeks 2-6, then will flush with water and mallasses. I didnt do any training, they are pretty bushy on there own, i do however popcicle each branch pretty hard, only want top cola nugs! i will deffinatley let you know how they turn out!