Just curious if anyone tried any of the OCE CM4521, CM5520 and/or CM6520 in a c451 c550 or c650 (excluding mix-matching the 451 model black toners with the higher models due to incompatibility).
Are the chips the same, but do the cartridges have a tab that needs to be broken off like with the old 8031s??
Are the chips the same, but do the cartridges have a tab that needs to be broken off like with the old 8031s??
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