This is the PCB and Panel for the Safety Value design that Sam posted at Look Mum No Computer. Check that out for more info.
PCB is only available in Through Hole.
Panel design by Sam Bartle.
PLEASE NOTE: As with all vacuum tube based designs, this module is very sensitive to noisy power supplies. Check out this forum post for more info:https://forum.gmsn.co.uk/t/safety-valve-noise-problems/355