Recently purchased 2 CDJ 900's and run them in HID mode with a Rane 62 mixer. Each CDJ is connected directly to a usb hub and the hub is the connected to one of my MacBook usb ports. I then run another usb connection between my laptop and the usb1 connection on the Rane 62 mixer. WORKS GREAT! The problem or issue I have is when connecting a second laptop via usb connection to the usb2 connection on the Rane 62 mixer I am not able to control the CDJ's. The only difference I see here is that the usb hub is not also plugged into the second laptop and this does not allow for a smooth transition for the second dj coming on board. Any helpful thoughts, comments would be appreciated...