your old system may have had something causing yur grief that youcouldnt figure out. copper maybe leached out of somethingits always a mystery but i agree simple is easy. thereis no point inquestioning what happened just enjoy what you have created. past is past. and im happy its workingout fro you now 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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