Just a FWIW...
I bought some (5) clear, chipped cartridges off eBay for my iP4850.....removed the original Canon chips from the M.T. Canon cartridges & placed them on the refillable, clear ones.
Bought the required selection of inks (in kit), which included all the necessary hypo's/chip re-setter/instructions etc., from the local computer markets & am happy as a clam.
No more expensive Canon cartridges to buy.
