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					Originally Posted by  DarkStar
					 
				 
				 And going from the back, yeah just scared to drill too far.  
 
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Estimate how deep you want to drill and wrap some masking  tape around the cutting edge of your drill bit at that depth.  If you don't get through the backing material on your first attempt, adjust the masking tape until your do.  Use light pressure on the drill bit.
 
Good luck.
		  
		
		
		
		
		
		
			
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