Unfortunately, Canon designed the MX860 to be really difficult to install a CIS system into
, so major modifications are necessary in order for you to install the CIS system into. One of our friendly customers was nice enough to make some detailed instructions (with pictures) specifically for this model. E-mail me at firstname.lastname@example.org
and I can send these instructions to you.
If you don't want to do these major modifications (which will void any warranty on your printer), then I would suggest to return the system and replace it with refillable cartridges.