Someone decided to actually sell the little hub punch:  Cartomizer Punch
$6 for the hub plus two screws. Pretty much at cost, after including the s&h to get the screws.
Costs less than a saddle valve.
(i'm not a supplier, get nothing from this, just glad to see someone make this affordable, good, punch available.)
	
		
			
		
		
	
			
			$6 for the hub plus two screws. Pretty much at cost, after including the s&h to get the screws.
Costs less than a saddle valve.
(i'm not a supplier, get nothing from this, just glad to see someone make this affordable, good, punch available.)