I was following Mark_jpn and assembled an USB detoxer (insane?) for my TerraBerry2… 
I toke an “usb breakout board male dip” and soldered the capacitor and resistor. (0.01µF,100 Ω)
For separate power connect i found a 2x5V power supply (2,1A each) (Thel NT-25HQ-09)
thel-audioworld.de/module/NT … Q.htm#NT25
Maybe someone here does have experience with it?