Ventana frames and rohloff rear hubs???

I've heard a few custom builders and even Rohloff suggesting to customers & custom builders to stick with standard vertical dropouts and a Speedbone setup for simplicity, especially on full suspension designs. The Speedbone attached to the disc tabs is probably just one step shy of being unobstrusive. Unless the suspension design is a URT or bottom bracket-centric pivot (alá LenzSport), there's no way to avoid running a tensioner. Some custom cable guides would be a cool add-on, though!