Limited Slot Reservation per Turn

This new version of game is way better than its previous version AT3 but in this gane now, the inability of the player to reserve airport slots of more than 20 is kind of frustrating. In AT3 slots can be reserved by up to 50 slots per turn, no hassle of going back to your routes just to adjust the schedules based on the avilability given by the plane. Can you please do something about it? Thanks.

Bilat Mo about AirTycoon 4, v1.3.1