I eventually ended up getting the Hobbicolors 5 BCI ink set with empty Canon carts as it was cheaper (in theory anyway ) as I have no original Canon carts. I am pretty shocked however that Hobbicolors DO NOT include the orange caps even though it says everything is included that is needed for refilling, this is simply not true as the orange caps are needed otherwise it is hard to get a proper seal when filling . Worse, I think partially due to there being no orange caps the carts have dried and there is dried out ink on the exit port, which they recommend cleaning out by simply running under a faucet/tap- surely this is not advisable with hard water and all the chlorine/fluoride additives here in the U.K.?