@ Gus - thanks for listening to your customers!
The problem with gadgeteer for customer prototyping is the immense amount of modules you end up with. No matter how much care you put into nice mounting plate etc it looks really messy. With the Cobra board with the extender, you have a nice starting point with “most basics” I end up adding anyway. I always have RTC-battery, usbDP, SD-card and some kind of network on my prototypes.
Hmm, I would go for the ECO version, which is the starting point, and then think about adding some more sockets in the space where the wifi-module is sitting to add networking etc. - on the other hand, then its not the Cobra II anyway.
Maybe even consider adding the RTC-battery holder on the mainboard when you are at it…