So have updated the source repository to include the hardware design and the rough layout for the board. None of this has been bread boarded yet so all untested but as they say, what could possibly go wrong?

There are two variants of the hardware, one for the old style USB-2 standard which means the connector is hand solderable. The second is for the newer USB-C. This unfortunately does use a SMD connector as I could not find a USB-C connector that was through hole. The up side is that the number of pins on the connector is kept to a minimum to make hand soldering a little easier for those without a hot air gun.