Beaglebone Black Cape machining fixture

I made this fixture to hold a Beaglebone Black cape circuit board while machining. I needed to cut a notch in the board to clear the RJ45 connector on the main board. I used it again, with the transverse slot to shorten a circuit board. You can add other holes and slots to suit your purposes. It held the board without and problems and I didn't have to worry about hitting the end mills on anything hard (like the mill vise).