I am trying to refill a Canon BCI-6BK cartridge for my I960 printer.  I bought the IMS kit from Costco.  The IMS directions for the BCI-6 cartridges show a picture of a different looking cartridge.  Mine has a white translucent label.  The directions say to drill a hole in the top front of the cartridge, but in my cartridge it looks like there is some metal thing under the top of the cartridge so I'm guessing I can't drill it.  I did manage to scrape off the label over a little round indentation and there is a bb there, so I am assuming that is the original fill hole.  So I tried to push it through with the Ball Push Tool provided by IMS but it won't budge - should I push harder or use a hammer?  Then will sealing with the bb work?  
Any help would be greatly appreciated.
Thanks
			
			Any help would be greatly appreciated.
Thanks