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			If you took your tube to a machine shop they might be willing to mill a bit off for you to make it true again. 
 
Alternatively you might want to try a combination of metal washer and fibre washer or PTFE washer (probably gets too hot for rubber under that sort of compression). My point being something compressible in the joint might help.
			
				
			
		 
		
		
		
			
		
		
		
		
		
			
		
		
		
		
		
	
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