hey man thanks for the love in my thread. Stoppin in to give some constructive critisism. Basically I'm just looking at the pics in the first post, I did read your thread just the first one shows the best view so I'm sorry if you've already upgraded something. Anyways, I love your cabinent It's a good size nice fans very ghetto but not important. The light looks like my 250 watt MH lol it's HUGE you said that's a flouro light though? that's cool I don't know what kind of lumen output or heat those generate but they seem to be great especially for veg. Tin foil is really not recommended cuz it creates hot spots and what not i know it's been mentioned but again I don't know what kind of heat it puts out maybe no prob. If it does become a problem it is advised that you use the dull side of the tin foil...All this info comes from the FAQs so it's not coming from my mouth.
Since it seems like your using it for bloom and veg your going to have to figure out a way to keep light out of there...a spare bedroom would probably be the easiest solution another would be plastic and maybe dryer hoses or something for the ventilation fans. Whatever you can do to stop light leaks. Lastly, about the pot size from the pics it looks like a 5 gallon bucket. It should be noted that a regular 5 liquid gallons is much larger than a horticultaral 5 gallons and you should have no problem with your roots in that bucket no need to transplant in my opinion. My buddy used to grow all hois outdoor in those and they will be ample for many months. If you ever saw the size of my buckets those are 5 gallon buckets intended for growing so maybe it will give you something to compare. Rule of thumb is 1 gallon per month of life. Do yourself a favor and pull the pot out of that precut hole stand it up on whatever you can,books or bricks etc., and get it right underneath that light and drop it down as it grows. You can see from your more recent pics that the lower leaves are already too far from the light and are recieving practically no light. Your plant will start to stretch more and more for the light and will quickly get out of hand especially when you force flower. If you can get some more lights in there too for side lighting like 2 foot flouros on the sides or CFLs that would be fantastic.
Very healthy looking girl you got there though, just want to help you out is all. Looks like you've done your research though and will definately come out with some great buds so for that I'm subscribed.