Jean Parrot -> August Abolins said..

 JP>     Remember about a year or two ago, you sent me some ink refills ?..
 JP> ..there is a "key" on top that prevented it from fitting
 JP> to a click.  I used a hand Dremel tool and ground the two ears a little
 JP> and now it prints in colours.

Nice work! I had read about other people doing exactly that. But alas, I
had no Dremel.

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