usualsuspect609

Nice plants, homie. That yellowing on the top is completely normal. Its how young growth is supposed to look. I like the slight blue tinge they have to them.

Right, maybe even more, at least 20%. Anyway damaged leaves do not heal themselves. So if you want trim off the tips. Its easier for the plant to grow new leaves.

Its the CFL's. My friend down the street has a cfl, hydro setup, and those guys were like alien plants. They were straight bushes! He backed off thhe lights a little to help them stretch, and since then they got a little taller. But in your case its a great thing, especially since you dont have alotta room. They stretch when you put them in flower. Expect some dense nugs.

I would flower before 10 inches. Plants double and sometimes triple during flowering.

32 " but like i sya if need be i can just build another one anytime. What about the node question? Is it a node if i can just see the leaves starting to come up or are they considered a node once they are developed into like a 10 bladed leaf?

Yeah that will be fine. How tall is the box so i can help ya on when to flower.

Anytime. Anyways, if its only on the very tips it probably want get much worse. If they start getting alot worse just flush them early. But i would wait till the soil drys. Anyhow overwatering isnt giving them too much water. Its giving it to them to often. Think of the rain cycle. When it rains it pours, then the soil drys out.

Ok, it sounds fine, maybe just a tad too much urine. Wait till they dry out and run a good amount of water through them, like 20% runoff water. Later if they get yellow again, dilute the urine much more.

Yeah if its not bad, then let them dry out a little more. But if the browning is bad then flush. To flush you just run water through them, until about twice as much water as the size of the pot comes out of the drainage holes.
Is it browning or yellowing, and is it just on the young leaves, or just the top?

http://www.ecofriend.org/entry/human-urine-a-great-fertilizer-for-the-plants/ You may have not diluted it enough.

Yes you need to flush. It sounds like Nitrogen burn. Is there any heat at the top of the canopy? Are they only yellowing at the top?