Just saw a question in the general discussion forum about trading between cities which, as you all know, is mysteriously missing in the core game:     This did however trigger a question: would it be possible to MOD this? It may sound a little advanced (or downright impossible) to do, but consider the following two options:   A. Apply the game logic from the Great Works building phase to a city:   You set a trade port to local, and in the region view of the GW you set the required material to 'delivery'-mode. If applied to a city this could work in same way (e.g. City A is producing plastic, City B is producing processors which a.o. need plastics. From City A, go to region view, select City B and set plastic to deliver'.   B. Extending the 'Gift' functionality with an automatic repeat function.   Currently the gift function is for a single transaction, but why not extend it with a 'repeat' function? (e.g. from City A, i select City B and in the 'Gift' tab i select the material (plastics), the quantity and i can select the interval: single transaction, hourly, monthly (in game time). If this could be done both for materials and cash, we could also, in return for the plastics, set City B to pay an x amount to city A using the same interval).       I realize this would require both some hardcore modding and also UI adjustments, but it would make a great fix for the game: some actual Region Simulation and cooperation between cities!