the only issue is by using a ball valve you don't have a very good adjustability as its oening is not linear, try find a "flow controle valve"  which idealy would be a needle valve or in worst case a diaphram or gate valve (last two not really flow control valves but still better than using  aball valve) 
  
Steve 
		
	
		
		
		
		
			
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				 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
  
Some strive to be perfect.... I just strive.
			  
		
		
		
		
	
		
		
	
	
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