ComputerVoltageSources

Since the Dontronics gadget builds the connector into the PCB, I think
it would be a shoo-in for a daughterboard**. But since there is no
predetermined physical orientation between the main PCB and the panel,
designing it into the layout of the main PCB would limit the builder's
options.
 It looks like a nice $30 option for folks who prefer a USB interface,
though.
-doc

** a ribbon cable, some strain-relef for the pannel mounting scheme,
and 3 headers and.... voila!