Not entirely sure in what sub forum to post this is since this is a little odd.
I got lucky and picked up a 3D printed Mercury camera the other day from a resale company that listed it as a camera case(!) (If you aren't familiar with their cameras and modules you can read about them here
So basically it's a fully modular system ranging from 35mm to 4x5 with different lens mounts, shutters, film backs etc. As far as I understand it my camera is an standard Mercury Front Panel integrated with a Graflok 23 back adapter, a standard focus unit and an Instax wide back. Everything comes apart except for the Graflok mount on the Instax Wide back that is glued to the mount itself.
What caught my attention was the Instax back to serve as a future instant option when I eventually run out of FP-100C.
What I'm unsure about is what lenses are compatible for this set-up? Can I mount the Instax back to any camera with a Graflok 23 back? I'm not familiar with how these things work but was hoping I came to the right place to ask before I buy something I don't have any use for.