oplink functionality is definitely available in the revomini firmware.
Revo: Radioport=Telemetry, Coordinator=False, UAVTalk=True, Comspeed=38400, maxrfpower=(set to your liking)
Oplink: Coordinator=True, UAVtalk=True, comspeed=38400, maxrfpower=(set to your liking)
One should probably pair the modems correctly, but its working as is so I never bothered.