http://www.refillink.nl/PDFDocs/PGI_550.PDF
I know there is a way of filling by drilling holes in the side. But here you have to be careful because the normal cartridge is partitioned in compartments in the inkreservoir (not the spunge) where the XL version is not. See the picture
Well, I have refilled these cartridges without any problem. Refilling method is the same as for all the other Canon cartridges (i.e. PGI-525/CLI-526 - PGI-520/CLI-521). I used the same (IS)ink as I used for those cartridges and there is no colour difference. The ink monitor can be disabled in...
I am a newby, but just found this message. I know Refill Ink in Holland is using Image Specialist inks Refill Ink is supplied by Ink Specialist in Schimmert.