@Michael - will try posting on Nvidia boards. Maybe someone will figure it out.
Nouveau is sadly not an option - I use a bunch of 3d apps where it would be a showstopper (Modo for example). In general because of Nvidia policy and trying to keep everything under their control open source drivers support for their cards is lacking (you simply have to use their proprietary driver if you need good 3d performance).
One of the reasons I won't get Nvidia card for the workstation that needs a replacement. But the one in my pc is too new for a swap. Maybe if I do a bit of juggling between PCs and keep Nvidia GPU only for a vm with pcie passthrough...
Anyways ... hope to get MoI running correctly on my Linux workstation - and I intend to keep on trying ;) .