I've got a printer. It's an SRA3 four colour HP inkjet, and the replacement cartridges - you need 4 - are hellish expensive. So when the local cheapo German supermarket - they might be sixty years late but they're finally beginning to win - start selling 'do it yourself' refill packs I thought 'Ah Ha!'
Bad move. HP printers have a chip that denies you this privilege. So I hunt on Google for a way around it. No problem ... thin strip of plastic to kill the printer's battery also renders the chip kaput ... except you have to have the hands of a teency weency baby to get near the battery. Finally with the aid of a ruler, duct tape and a pair of tweezers I manage it.
So ... I have the requisite inks, an instruction book in German and Slovakian, a thick pin with a plastic handle and I'm facing four ink containers. Naturally, I'm not that stupid, the instruction manual mentions HP but oddly doesn't have a picture of my specific model, or of it's cartridges ... perhaps I am that stupid.
After coffee I get the electric drill out. Gotta be they way you'd think ... but alas no. HP are far too clever for that. Crafty old HP.
Inside the outer casing is an inner lining made of material that could withstand bullets and probably nuclear weapons ... but I don't know this at the time I squirt a whole bottle of cyan (light blue) ink into the newly drilled hole. The ink, as liquids do, went straight down between the casing and the lining and out of the bottom; pouring onto the desk, the carpet, the telephone and all over my hands - I'd really like to add the cats are blue, but they're sensible and had fled at my first shriek.
Miffed, but not cowed - onto Magenta.