I was thinking that if the PCB extended just a little bit to the "top" of the board (the edge where the SD card is), there could be a hole that would allow a standoff to be inserted, allowing the MoPi to be solidly connected to the main board. As it is now, there is a little bit of give to the MoPi, and I'm thinking that can't be a good thing. Just a thought for your next revision.
I was thinking that if the PCB extended just a little bit to the "top" of the board (the edge where the SD card is), there could be a hole that would allow a standoff to be inserted, allowing the MoPi to be solidly connected to the main board. As it is now, there is a little bit of give to the MoPi, and I'm thinking that can't be a good thing. Just a thought for your next revision.