Hi there Hoodwinked, I have a few answers and a few questions for ya.
I was wondering whats under the cover? (are the rockwool sitting on a mat, clay, etc...) just curious....

Can the plants stand up without the supports (straws and such)? If they can I would turn the fan down till theyre just swaying and as they thicken up over a few days turn it up and so on, gotta get em strong enough to hold the weight of the buds posting them up now will keep that from happening.
I irrigate my system for 15 minutes every 2-3 hrs during daylight hours, starting as soon as the lights get full strength(about 5 minutes after they turn on); and stopping 2 hours befor the lights go out. That's just what seems to work in my ebb and flow system.
Surf the posts.....Hope it helps