I have damaged a few chips transferred to a CIS I bought from eBay. It's a pain in the a$$. I also dropped and lost a chip in my ip4300. It's now stuck in the printer somewhere. Cost a fortune to buy a few more used CLI8 carts from eBay because of the (high) flat rate usually set by sellers on eBay. Well, the CIS only worked for about a month then it went straight down hill. Eventually has to toss it down the toilet. Will never touch any CIS again, especially CIS made in China. Not cheap in fact plus the inferior ink they provide. I's say leave those chips alone. Refill the OEM carts as they are.