Hey Crispi
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Containers dont need to be that big . 
Our rooms are identical in size and height  6ft sucks , Im jealous - I only have 2000w. though  4.1 oz. or lbs. ? You'd be suprised .  I only top once right when your talking and average about a lb. per bucket . Could yield more by additional topping but tying all that to the ceiling is a p.i.t.a and hinders my spinning the buckets easily . 
Thanks for the input...4.1 dry oz in a soiless mix my first time out.I have another 1k hps in the wings but it seems overkill as I have trouble with temps now.Glad to know Im on the right track about topping.Ive been pretty tenative about any clipping,trimming at all.I did clip the smaller thin branches this time and that is mostly what I took the cuttings from.

I know your right about the containers and their size.I was just wondering what a person could do with a series of 18 gal containers and a 2-3 month veg.I think about that often and wonder if one had the vertical space if you would be able to match or beat an outdoor grow?

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Check out my last go , maybe some ideas etc...^

You can never have to much grow equip. bro. be careful it's contaigious huh ?
Peace 
As soon as Im done here Im gonna check your stuff out,thanks for the input,and your right about equipment,Im always looking to improve my setup.Take care and thanks again brother.