I finaly got my act together and made a MIDI out cable for my BB. This allows me to use my Superior Drummer sound library and Toontrack patterns without any conversion. It also let me add hi-hat control using an expression pedal to my VG-99 and routing it to CC#4. Everything then goes to my iConnectMIDI4+ and my BB is now working as a pattern player, and tempo master, and doing a great jobb at it.
Now all I’m waiting for is for the BB to receive song/patch change.