Is there already a community (or krtkl) design for a board that would receive the snickerdoodle, and adapt it to a RasPi form factor (and 0.1" header IO), for the purpose of leveraging existing RasPi ecosystem “hats” or add-on boards?
If not, I guess I’ll draw one … but it seems like something that someone must have already made … ?
I don’t belive I’ve ever seen one, but if you want to design/build one we’d be happy to spotlight it on our site. 
We’re also still looking for the first project on our Hackster page…
What PCB package are you working in?
As long as it’s not KiCAD:
Any chance you want to export an “interface” design that would be just mating connectors from the piSmasher (for connectors-down snickerdoodle), plus the outline for the snickerdoodle module on an assembly layer?
As a bare schematic + PCB, or as a single library “part” would be fine.
And it would be extra-great if that export could preserve the Jx_xx net names from the module-side of the connectors
Otherwise, I’ll need to reconstruct it from the mechanical drawing PDF and Samtec footprints, and likely make a mistake in the process the first time :\
You should be able to pull the .pcb and .asc fies for breakyBreaky off GitHub: https://github.com/krtkl/open-source-layout/tree/master/breakyBreaky
That should give you the snickerdoodle footprint template you’re looking for.
Is one of those the schematic file? The .asc seemed to import fine and provide the PCB layout.
I’m hoping to be able to get the complete designator/pin number/net correspondence all already worked out, so I don’t make any mistakes there either …