Thanks for taking the time to help. I have thought about running at .7 before and still may do so, but I am sort of on a budget and need to get as many done as possible this month before the heat picks up and only have so much I can spend. All together it isn't just going to be the 1 2.5 square, I plan on building 8 of those with 18 cobs replacing ever 1k I have. But instead of making the 18 cobs all connected I want to make 2 separate boards for each light replaced so it will help me position them a little better in the room. The room is 5.5 ft wide and 11-12 ft long. So I figure about 2.5 ft squared per panel would fill in the room nice and not give me many gaps. And with the total wattage at 2628 that equals around 40 watt per square foot with LED. I know it may be overkill but I like the buds that are produced with the higher light power and only have that much room to work with for now so I am making the most of it.
For heatsinks I would love to buy 3 30" strips of heatsink and make them all 10" seperate for a total of 30" long and 30" wide, having something connecting them together at the 10" away width. Then I could put a central fan on each of them and have just 1 fan per every 3 cobs. I do not know if this would work but I hope I can make it work without costing an arm. The question is how big of a heatsink do I actually need in this situation. Looking at heatsinks on Heatsinksusa I would like to go with something like their 2" or 3.5" or 4.85, pretty much anything around $1 per inch or less as that makes them about equal in price to the Alpine 11 at $10 each. I wouldn't care to go with the 4.6" if I had to and pay twice as much, I just don't think I will need that much heatsink if I am running 30" of heasink per every 3 3070 at 1050 and put 1 fan in the middle of every strip. I don't mind actively cooling it is just the thought of having 72 fans going in the room seems overkill for me (how many cobs I plan to end up with). I just don't know how many watts each fan from alpine 11's would use.
