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			#2  
			
			
			
			
			
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			i would say the 1/4 inch ring gap on the top ring might be where it all started.  hard to tell, how does the cyl wall look?
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			#3  
			
			
			
			
			
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			I didn't see any gouging. But it was discolored you could tell it was rubbing.  It still looks smooth to my eyes.
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