Welcome to the forums @Norfolk_Chris!
You can change the capacity of depots by yourself.
On the main menu, go to Tools -> Rule editor.
Choose the vehicle type you want to edit it's depot (or you can do it to all of them at once).
Increase "Depot repair capacity", and save the ruleset.
When creating a new game, choose the ruleset you just created.
You can change the capacity of depots by yourself.
On the main menu, go to Tools -> Rule editor.
Choose the vehicle type you want to edit it's depot (or you can do it to all of them at once).
Increase "Depot repair capacity", and save the ruleset.
When creating a new game, choose the ruleset you just created.