Extracting ink from carts.
You may not need to drill any hole or anything on your cartridge.
Check this thread from dpreview.
This is the conversion of how to extract Epson's cartridge in simple steps.
Get the kit from
|Chicago Alley by tko|
from Down the alleyway
|Callan-5680 by vbuhay|
from What Child's Dream May Come
|Widget by Wilfried HKG|
|Oxbow Bend by stickpointed|
from Landscape - Colour #2