I'm sure this is a naive question, but where do the replacement hard drives come from that are being sold on eBay? Did someone copy the info on a Z2 hardrive and then make copies on blank hard drives, and is there some potential copyright liability here or possibility for long-term problems (although I realize you keep your Z1 hard drive)? Or are these hard drives with Z2 info that anyone can legitimately acquire (apparently outside Pioneer)?
I want to get my Z1 updated, and it is tempting to do the HDD switch since it purports to convert the Z1 to a Z2 at half the price of the update discs. While the HDD replacement apparently works according to other posters and the feedback on the eBay site, I just would prefer to avoid solutions to upgrading which are in the hacked and/or unofficial sphere.
I searched and did not find the answers to the above questions elsewhere on the site. If there is a thread which answers them I would appreciate being directed there. Thanks for the help.