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			 Yes they do and here is a link 
		
	
		
		
		
		
		
	
		
		
	
	
	http://www.reeffrontiers.com/ I know when I was having a problem trying to figure out how to plumb my 190 Mike - Mojoreef - was excellent and did up a schematic that I was able to follow and even offered to phone and talk me through it. His web page is also well worth checking out.  |