"Ian, I Have exactly the same problem as you, I emailed the DIY drones support email and they weren't very helpful, suggesting I replace the custom cable they sell with another one. This is a definite issue. My hunch is a bad batch of USB Xbee boards…"
"While WIndows Mobile and regular Windows share a name and some visual elements they are two totally different operating systems. (Mobile is based off of PocketPC, a different beast) Transferring the program over would be require a lot of rewriting…"
"What about if we put two slots on the ardupilot mega, one on top, one on the bottom which would double the amount of capacity for two shields. Another option is perhaps there could be an expansion shield which would have cables to come off it and…"
"Did the glider with the engine mount or was it an add on. Did you buy the add on? I was thinking about something similar for one of my own projects. Thanks!"