I've never had the early flowering problem, I hear a lot of guys talking about it. I put mine out May 12th this year. My clones are under light for 20 hours a day and then two weeks before I put them outside the light gets gradually cut back to 16-17 hours. By mid-May we are close to 16 hours outside. I just put them out, no transitioning. I guess I've been lucky.
I never worry about rain till Sept. I HATE having to built tents over them, cause if you know Oregon, you know the gorge gets ripping winds, and that always messes with covers. One one thing I don't might the wind for is, if it does rain, the wind dries them out faster.
That fatty bud on my avitar pic is from a Cenex plant I grew a couple years ago, I have 4 Cenex this year, so I'm hoping I get a bunch like that!
Good luck on your growm man..It looks like youve got your shit together on it!!