After completing the mastery for WSR can you actually drive the 4F (And what elce do you get with it?)
The 4F from the mastery reward is just an animated model, you can't drive or interact with it There are some timetable services for the 4F on the steam gala timetable, but only if you have Peak Forest
Mastery on WSR does not unlock a drivable 4F, but a very slow moving mastery tile at Dunster where a 4F is unloaded from a truck. You need the Peak Forest Route to get the real, drivable 4F.
If you do get PFR to unlock the 4F timetable on WSR, don’t forget your double whistle before pulling away if double headed, to get the AI driver on the tandem loco to release the brakes.