BLUE WIDOW and THE CHURCH in soil. SEEDLINGS. Need guidance

this is my first grow from seed and in soil so all advice is appreciated.

i have 4 dinafem blue widow and one green house seeds "the church" all feminized. they are all 12 days from seed.

germinated in paper towels, placed into 1'' rockwool cubes in a humidome and then into a 70% miracle gro moisture management potting soil / 30% perlite mix in 6'' clay pots when each had a half inch taproot (7 days ago). been lightly watering twice daily with 5.8 pH pure RO water thru the tops of the cubes and recently in a small area of soil around the cube.

i just need to veg them to a nice little bush big enough yield 5-6 clones from each for hydro as fast as possible, i have no need to keep them as mothers right now. i had planned on using lst for a few reasons. a big one being this guys results in these videos. tell me what you think...

part 1 http://www.youtube.com/watch?v=OBjZYWS2ItA
part 2 http://www.youtube.com/watch?v=3MB0pUi-giI&feature=related

here are my girls. they are all in the 1.5'' to 2'' height range right now, just forming second set of serrated leaves. the church is marked with a pink paper clip. the 4' fluoros are about 2'' above tops. lights are on 24 hrs and cool to the touch. let me know if you see anything wrong or needing improvement. again, all advice is needed (especially feeding/watering schedule, ppm, etc.)

I cant really help you much but everything looks really good as far as I can see. If you plan on growing those mothers in soil the ideal ph would be around 6.8 for abosorbing nutes but that might not even be an issue, just a thought..

thanks treez. that baby in your pic looks nice. is 6.8 where you like to be when using soil? and do you think i have enough nutrients in the soil to just give them pure water for a couple more weeks?