nabla:  Not worth the effort IMHO.  The contact issue should not be too hard to resolve, but the rest would be difficult and likely error-prone.  Not to mention hard to explain to newcomers.

Except in Triple Gammon, which I don't think should be played here except with long timeout periods, the differences among backgammon, gammon and single game adversely affect only the losing player.  A player can avoid losing too many points by delaying his resignation.  A player who times out doesn't deserve too much sympathy.