Thanks for the reply

I have infact changed my mind on the system, ive had a chat with a few pple who grow and ive ran this idea past them.

2.5M x 2.5M x 2M (metre) Tent holding 2x20 pot wilma systems, initally i will remove 10 pots from each system and grow from AK47 clones, 20 in total in 2seperate systems. so 10 pots each in 20 pot systems..? sound ok..?

The reason for removing the 20 pots is to allow more room fror the babys to grow, and this being my first grow im thinking do a few lesser plants it wont get out of control and i could manage them properly.

I have also just bought 4x600w air cooled HPS lights, im going to mount 2 lights over each wilma system, does this sound ok...?

I dont want to grow trees, id like to keep the hight to 4ft, about 1.2metres maximum, how long should i Veg for, im thinking about a week before i put them into flower, im using 20 cuttings cloned from a friends plant, how high should they be before i put them into the pots.? im thinking about 9 inches..?