A 10cc syringe w/a 16ga needle, a #60 drill, and some scotch tape and it works quite well... BTDTGTTS On some tanke, tho', be sure to seal the area well with tape where the jet sprays out of the cartridge cuz the ink can flow right out as you're filling it. THEN seal the drilled hole w/the tape and let the inside pressurize and balance... might take a bit of wiping after balancing out, but it's worked on HP inkjets for some time for me..... About 3 pints worth so far!
Cheers!! Bill