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I would gladly play, but I don't understand how the play-by-post game will be conducted without an online connection.
A timer is needed in any case, because otherwise it will be impossible to control intentional delays or players who have stepped away.
As for autosaves, this can only be done if there is external approval for misclicks, or an agreement between the players. And only for those moments when it is really not a miscalculation, but a deliberate action.