This my second TEA laser, and although it isn't the best, it's still pretty cool. I have a video of it firing, and if  I shot at a black piece of paper for minute or two, it would actually make a hole! It took me about 30 minutes to build and a couple hours to adjust the spark gap. 
http://www.youtube.com/watch?v=Z8AVzZ_LcF0
				
			http://www.youtube.com/watch?v=Z8AVzZ_LcF0
			
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		 Have you tried adding a mirror on one end to double the output?
 Have you tried adding a mirror on one end to double the output?     
 
		
 
 
		