Bc2000 (for the BCF2000 & BCR2000)

Hi, I'm a Wonnabe in the DAW-Controlling and Computer music.
I've any vintage synthetizer  and I'like to learn the use of a DAW as Ableton/Cubase/Logic and I would ply any Software Instruments as Reason to Improve my musical options.
I need tu build a clone of the Roland PG1000 to controll my D550, and I like to create a hardware controller for my Waldorf Pulse, my Korg Ex-8000 and my Roland xv5080. Moreover I'd like to use the same controller to pilote the softwareinstruments, that I will use.
With 2 BCR2000 and 2 BCF2000 I could habe enaugh phisical controll to realize what ich shall do, but ich can't underständ from the usermanual, ich I can conntect only 2 B-Controll (1 in USB U4 mode and 1 in Standalone mode) or I can do it with 2 BCR-2000 and 2 BCF2000 at the same time. 

I haven't bought just any controller and I need your tipp to understand, if the Behringher products are what I need.
Bye
drmacchius