I've mounted a Pi0 to my Nybble (excuse my soldering, it's not my best work!) using one stand off and one included board mount piece.
You don't have to add the Pi during build, but you need to use the y1Pi pieces. The screw holes are very easily accessible post-build when Nybble is in the calibration position.
@Howard Patterson thank you. For now I'm just controlling Nybble aka Roco (named after my late cat Coco... it was going to be Rococo, but I prefer Roco lol.) Wirelessly using terminal SSH on my phone and OpenCatWeb, which works really elegantly. (props to @leukipp for developing a lovely web interface. Though I had a touch of trouble getting the web interface to display, it suddenly started working yesterday!)
I'm currently working my way through understanding Nybble.imo, I've not coded in C++ since my - high school for US, college for UK - years. So that might take some time. I'm also toying with the idea of extending ardSerial or possibly OpenCatWeb as both are coded in Python.
Ideally my end goal would be to get Nybble walking and learning through the Pi0 autonomously with self-guided wireless charging and maybe the very distant possibility of using machine learning via a cloud service?
But in the meantime I'll try and work with some additional sensors as now I'm off furlough and working, I won't get much time to work on him... :(
I've mounted a Pi0 to my Nybble (excuse my soldering, it's not my best work!) using one stand off and one included board mount piece.
You don't have to add the Pi during build, but you need to use the y1Pi pieces. The screw holes are very easily accessible post-build when Nybble is in the calibration position.