I've added VIX 2.4 build 155 to the downloads section, tested and confirmed working on my own V2 DUO Ferarri clone. So if anyone with a Duo clone wants to upgrade to one of the last clone safe VIX builds you can safely use the version in downloads.
I also have a patched OpenVIX 3.0 image that works on clones I flashed it to my clone Duo yesterday. It's not an official VIX release and it uses older drivers to get around the anti clone measures in newer VU drivers, the same process as DM800 clones use to get around anti clone protection in newer drivers.. I will upload it to downloads section tonight.