One option would be to not use a Paragon. Instead, use two Pauper boards and build around an enclosure that can hold them side-by-side. I did the same thing with the two Pro-10 boards to build a complete Protein clone with the ability to switch the order. In your case, you could wire them to run parallel instead of in series and have a whole lot more control over how the two interact with one another. Might require adding your own little PCB to create the mix but still way easier than trying to attempt this with a Paragon.