Updated: Jul 24, 2020
The GitHub pages for the RG-350 and RG-350m have been updated.
Added to that, I've been notified that the RG-350 Rogue firmware unofficially supports more devices. So I've listed those too.
Be sure to check out Ninoh-FOX ;)
Do note that this firmware is not officially made for these devices! Update: RG-280M (2020) does not work!