Artillery supply

[FM WarB]

I've been experimenting with a way to change it, especially useful for multi day games. I've created a "caisson" unit which is guns which cannot fire. The unit adds to the army's arty supply when it arrives on map by whatever "rounds per gun" is set in ptd file. Set at five, six "guns" add 30 points. If captured by enemy, the full thirty points are not lost, but the loss would still be unpleasant.
Hello line of supply in large map multi day games! Park them, and they are depots, but guard them if danger looms.