First grow: lowlife auto ak47 feminized

Hello there, I'm a total newbie and I would appreciate as much useful info as possible.

I don't have much space therefore I have chosen autoflowering plant since they usually tend to be smaller than non-auto. Though it looks like auto ak47 can grow rather big and now I have realized that my space is too small (I'm using ex-pc box). I've red a lot of controversial posts about autoflowering plants and micro growths

Pot: 36x15x12 cm (14x6x5 inches)
Box free space: 39x18x40 cm (15x7x16 inches)
Distance from soil to lamps - 28cm (11in)
3x 21w CFL, 2700k spectrum, all make about 3780lm
Soil - soil for cactus, bought in local store, 85% compost, 9% peat, 6% sand, mixed with baked clay pieces.
Conditioning - there's a small ventilator, you should be able to see it in the photos.
Light - 20/4
Temp - 27 C (80 F) day/ 24 C (75 F) night
Nutes for vegetation - BIOPON foliage plant fertilizer (http://www.bros.pl/?s=products&lang=2&brand=2&t=57) 8-3-4 NPK

Records so far:

2010.12.28 10:40 put the seed between two damp sheets of paper
2010.12.30 10:20 seed germinated. Planted it in soil.
2011.01.01 15:10 Sprouted! 1cm height
2011.01.02 19:40 2 day. 3cm
2011.01.04 15:30 4 day. Replant. Added more soil and watered with 0,5l water + 1/4 nutes.
2011.01.05 22:30 5 day. Replantation was ok, the plant looks good. 4cm after replantation.
2011.01.09 20:20 9 day. 6cm. Watered in the morning 0,5l. Looks like third floor is coming.
2011.01.11 14:00 11 day. 0,5l water with ¼ nutes. 4th floor is coming.

I have some questions, I'd like you to answer:
My main problem now is - what can I do with the space I have and what are the best possible outcomes? Or I should definitely move my plant to a bigger box? Maybe SCROG or LST would help somehow?

Also, I've chosen 20/4 light cycle since that is recommended by breeders, but I've red in some grow journals that people change to 12/12 or 18/12 even though it's an auto. Should I switch as well?

And am I using nutes too early? I was afraid that the soil won't have enough nutrients. The plant looks fine though.

The photos are done an hour ago, so - Day 11

Day 13

So, I've watered it again (O,5l) in the morning and decided to start LST'ing it. I've used a hook that I cut out of wire.

Now I'm wondering if hooks in the soil will be enough or maybe I will need to tie them to the pot...

Day 18

I'm continuing LST'ing, but I need some help with it I think that fan leaves are blocking the light for the small branches.

Also, I'm thinking about about buying panda film or something like that what would reflect more light. The problem is that panda weights a bit and shipping of the 10x10ft to my country would cost about 50$. I'm trying to find some cheaper alternatives.

Day 25 (middle of 4th week)

Today I've started giving nutes for flowering Hope they won't do any harm I'm a bit worried because the tips of some leaves turned light light yellow. You should be able to see it in picture Day 25 (7)