Here's BB master and RB slave to MTC, using midiout.dll plugin http://www.thepiz.org/plugins/?p=midiOut set to MTC LoopMidi in a midi track plugin slot.
RB midi in set to LoopMidi https://www.tobias-erichsen.de/software/loopmidi.html

RB > Options > Sync Source > MTC/SMPTE

VoiceMeeter Banana http://vb-audio.pagesperso-orange.fr/Voicemeeter/banana.htm
BB > Voicmeeter ASIO
RB > Voicemeeter AUX ASIO

But BB ReWire to BB will work good when they get it done.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
BB_RB_MTC-1100.jpg (302.91 KB, 100 downloads)