I have to install the winusb driver again if i unplug it, even if back to the same port.
If i start cgminer with both connected, it fails.
I only had the winusb driver issue when I was running a new R-box at the same time, not seen it in isolation before.
I went to buy 5 of these yesterday; and found Bitmain had removed the option to buy only 5.
Will see whats going on with that.