The request size depends on how many drones you put into the request depot,
1 Drone with 0 stack upgrades, will mean the request size is 1 stack,
10 drones = 10 stacks
1 drone with 4 stack upgrades = 5 stacks per drone
10 drones = 50 stacks
The size (60k) is just there so that it won't be capped and has space for spillover