Amazing work you've done here! You were among the people that made me think "sure, let's do it too!" so I did start a KSP controller (of which I'll put pictures soon).
It was a great occasion to learn Arduino. I still have some difficulties (we don't have too much programming in architecture studies ) but things are slowly moving into place.
I saw that you might plan on releasing your arduino code here, that would be amazing for me! I spent the whole day fighting with 8 7 digit displays and I came to something, but I'd like to see another kerbonaut's approach.
Keep up the good work!