I have been able to fit aftermarket chips onto CLI-8 bodies. It is not for the inexperienced. Just like how Pro-1 aftermarket chips are fitted onto the Canon OEM bodies, the identical procedure is carried out on CLI-8 bodies. I have a good stock of aftermarket chips that are resettable and work on the Pro-100. This procedure however needs to carried out with a level of precision as if too much is milled out the reservoir will be breached. On the Pro-1 too much milling does not compromise the sealed body, not in this case.