yeah... my carts are CLI-821 C,Y,M and blk, CLI-820 pigment black..
I do refill it so that it wont dried out..
also.. dont know where to put hoses on the carts... there IS a factory hole on the reservoir side of the carts, but if i put hose on that slot, it might jam the printer's head on the plastic cover,
should i drill a hole on the sponge side (where the tiny air vent holes located) and put the hose on that place? there is a wide space over it.. so hoses will not jam nor torn down while the machine is printing..