So not sure why this one has me obsessed
but I put this together...trying to figure out the switching though, that confused me a little. As you can see two wires from each 'board' need to go to INT1 and INT3 but I would like to be able to choose which 'board' to use and then combine the two...is that possible with this anyone think?
Please feel free to tear this apart, it was a quick try...