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The flight instruments (namely the artificial horizon) is now being driven by the MPU board (MPU9250 -> Arduino -> iMac).
Eventually all of this will be put together and run on a PCduino with its own screen.
More work to be done. Fun, but slow.
Here's a video: https://www.flickr.com/photos/54366879@N06/16476904241/
(Too big for zenith.aero).
Note: the colourful spaghetti of wires is a left over from another project. Just too lazy to remove that (and later put it all back).