I purchased an ink system for my Canon printer, only to find the one that was sent to me had to be modified to work even though it was listed as being an exact fit. After finally getting it installed I found on my prince to come out green. I didn't have this problem with the CISS I purchased from inkjetfly. When I contacted the owner of the company Alexander for help, he was extremely rude to the point of being insulting. I did manage to get the super secret supersmart company phone number (you will notice it is not posted on the website because the owner does not want to have to ssupport anyone). After being called a "hillbilly" by the owner (I assume because I live in Virginia), he seemed very surprised when I called him and asked him about his antics. If you want to speak to the owner, you can contact him at 727 515 3384 The owners name is Alexander Malychkin.