Beautiful Soulcraft. That's a custom frame, right?

Watch out though; Rohloff says bad things (see p.30) about using the OEM2 adapter with ISO disc chainstay mounts. I assume because that positioning makes pedaling torque push the hub axle downward and potentially out of the dropouts. Shouldn't be a huge force, and if you fasten the axle tightly you probably won't notice.

Thanks for the links to the eccentric BB converter kits, that's another interesting way to go.