I put the "sludge hammer" into 12-12 flowering 3 days ago and plan on putting it back into veg when it shows its gender. I read a post that said it would work!! I am nervous about it though!! Do you kn if this is true??
This definitely works. You can reveg plants unless they are autos. It does take time though, about a month, during which time growth won't be slow, it will essentially stop. This is not the best way to test for sex though. As was already pointed out, take a clone and let it root under 12/12.
I also need mylar but cant find it at Wal-Mart! Where should I look for it?
I second the recommendation for white paint. I prefer white plastic, but flat white paint is pretty hard to beat. I realize you already went with the heat shield. A fine choice as well. I'm just not a fan of shiny walls.
I've seen reflective insulation at home improvement stores, flat white paint is pretty damn good, and I've used survival blankets, which are disposable per run. The flat white paint would be my choice, just my choice...that's all. The mylar you speak of is available at grow stores, that's the only place I've seen it. When I tried to scrub mylar, I had to wash it many times and could never get it like new, maybe just me, but every rinse left an opaque residue, if ya ever have to clean it try ro water.
I totally agree with McL here. The emergency blankets are a great cheap source of mylar, but I also prefer the white paint, or white anything for that matter.
I now have the temp at a steady 78-79 and will not be adding CFLs but will be replacing the 2 200watt CFLs with 2 100watt CFLs for flowering!!
Don't reduce the amount of light at flowering. If anything, increase it! Those temps are fine. Bigger plants shouldn't cause the temps to rise, but we are heading into spring. Can you cool the room the grow cabinet is in?
No, please tell more!! I am learning a lot from you all!!! I am a very good learner may I add!!! LOL... So the closer you get the light without burning her the more dense, resiny, and potent she will be!?
Always put the light as close as the plants can tolerate. When they are young seedlings or clones, that may be 2-3' away, but once they are starting to grow well, put that light as close as it will go without burning them. With CFL's, that's pretty close.
One other thing. Do you have anything reflecting that light back down towards the plants. Putting the CFL on it's side is the way to go, as opposed to point them end down, to get the most light, but half the light is getting wasted heading up. You got your sides reflecting light back. Now what about the top? Obviously don't start a fire, so keep a close eye on it, but you can probably rest that heat shield material right on the CFL's without an issue.
Your plants look great. Your LST pics look fine. Now do the rest of them.
It IS psychologically tough to cull plants. If you really wanna see a tough one, check out my journal post from a couple days ago. I had to cull 9 LARGE male plants. I have a picture of them all hanging up. Last night I culled 22 male clones, from those male plants, as well. Sorry McLoadie
This helps me out a bunch and gives me a good mental vision of what your are explaining!!!
to me LST is in a way like scrog but without the net or wire 
are you going to continue with LST for that one at the back?? you'll prolly need to lift it up as the others grow taller and bring it to the front for simple ease of access to train it in the future.. 
*chuckles*
