Nice work! I have been too distracted lately. Been learning stuff about the Speeduino project in order to "update" my friend's 4cyl inboard boat from 1980 with throttle body fuel injection. A Roomba was given to me for father's day. (I suspect an inside joke about role reversal made about me) So, looking at this very determined little machine, I might use my new skills to make a "Lawnba" to annoy my neighbors with fits of jealousy.

Are you going to use a socket for the Pro Mini, or just solder in?