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					Originally Posted by  Rimrock
					 
				 
				One can count the tube as the fill line, say the bottom - half way up the tube.  
If one need to put the machine on the side, don't forget to temporary seal off the air intake hose next to the filler tube) A suitable self tapping screw will do 
			
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Right on, thought that was the case. Ended up taking around 40Ml to get to the bottom of the fill tube. Thanks.