I prefer the 1.7 singles in my tanks but I hated that the tank could slide over the carto. And I haven't found flanged single cartos. Sorry I don't have pics but I took a vanity cone and cut it down to about 1/2" long. Screw it on an eGo battery the put on the tank. The collar will prevent the tank from sliding down.
	
		
			
		
		
	
			
			 
				
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		