Yes, this would indeed work, but I'd rather push actual orientation to the mount directly, without moving.
I think the correct solution would be this:
- write a driver for the orientation sensor (it might even work with indi-duino driver), best output would be probably alt-az coordinates and maybe also pier side
- patch eqmod to optionally snoop this driver and use these coordinates if everything else fails (Skywatcher::Init() at the end)