I don't think I'd use 24" on a 24.5" tank. I'd either splice it in the middle as suggested or get a 48" wide piece and cut off 23.5" of it. 
		
	
		
		
		
		
			
				__________________ 
				 -- Tony 
 My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills.  Whee! 
 
			 
		
		
		
		
	
		
		
	
	
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