This time for real

I tested factory rebuild times in a custom arena: Compello with default tables.
In all three countries I killed the ammo factories down to 50%, but with city in Rookland=100%, Bishland 65% Knightland 49%
As expected, Rook factory was the quickest back to 100, though in an astonishing ~30 minutes only. The real surprise: The Knight factory, at city level 49%, was considerably faster back to 100% than the Bishop ammo factory (city 65%): about 15 minutes earlier!
(Knight factory 60-70 minutes, Bish about 80 minutes)