13-05-17, 01:53 PM 
		
	
	
		So... I've just tried the Cobalt bit and it won't touch it either! 
How the hell did you do it? Feeling like a might need some sort of diamond tipped bit now :lol
	
	
	
	
How the hell did you do it? Feeling like a might need some sort of diamond tipped bit now :lol

 
 

 
