A friend I know was able to get one of them wire saw's like boy scouts do, wedge it under the tank and start sawing, add rope to ends to make it longer if you have to. works great on the foam! 
 
Good Luck!!
		 
		
		
		
		
		
		
			
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				1986 V20   
Old Fishermen never die, we just SMELL that way!!
			  
		
		
		
		
		
	
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