Hey this is looking great!   I have just started building a light fixture for my 290 (although the tank is not set up yet).  I decided to do fewer LED's than you (180 total) and rather than the heavy heatsinks I have gone with large u-channel.  Glad you are a few steps ahead of me so I can watch your mistakes (haha). 
		
	
		
		
		
		
			
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				Mark...
  
290g Peninsula Display, 425g total volume.  Setup Jan 2013.
			  
		
		
		
		
	
		
		
	
	
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