We are 2 dj's collaborating on one laptop and have been doing so for a long time. Currently using 2 x F1, 2 x X1, 1 x Maschine and wanted to use 2 x Z1 controllers to our setup, but it not possible. When we connect the second Z1 controller, the "driver" just switch to the controller. This both happens on OS X 10.7, 10.8, 10.9 and Windows 7... We really are surprises by this limitation… What is the idea behind it? All the Kontrol series is minded on flexibility and mobile setups… But not the Z1? Why?