Haha, the Swap-a-roo method used to work with some old HP inkjets. You needed 3 old cartridges iirc, install one, power on, install the second, install the thir

Haha, the Swap-a-roo method used to work with some old HP inkjets. You needed 3 old cartridges iirc, install one, power on, install the second, install the third. That's it, the next one you install would be considered "new" and would work. Apparently the printers kept track of the cartridge IDs but had a short memory. Refill all of them and use until they start leaking (so, years of constant refills). Simpler times.