My project, after 2nd edition Tonkin is made, is to create a new Dien Bien Phu game. It would only cover the fight for the main fortress from the end of March until the beginning of May. This is when the French actually starts to fight back. Keeping to the central fortress also gives me a good scale of the map. It would have, what I would call a floating game turn. Both players have their units and a set of cards. Each card represents a certain phase during a game turn. The point is that both players have the same phases but do not need to play them at the same time. For example, the French perhaps wants to play the replacement card while the Viet Minh decides to play the assault cards.
The full map (as it is now) can be viewed here: