I hadn't heard of the change with the newer models. I've helped someone do the tape hack with the starter cartridge in a 2170W -- worked just fine. Can you el

I hadn't heard of the change with the newer models. I've helped someone do the tape hack with the starter cartridge in a 2170W -- worked just fine. Can you elaborate a bit on this "gear" hack for the newer models, so that I know what I'm looking for? Thanks.