No. As soon as I plugged in the usb quadrant, the computer defaulted to the usb device (which is plugged in to the yoke) and "forgot" the pc/2 (circular plug) quadrant. I can't get the computer to recognize the original pc/2 quadrant at all anymore. It was working fine prior to plugging in the second usb throttle. I have an extra yoke and throttle quadrant, so I plugged those in thinking that it might be hardware... but still no go. The usb throttle quadrant works fine now but the original pc/2 one is dead. Any ideas??