Nice work (no surprise!!!) Johannes!
Just a couple of tiny remarks:
- The red you used for the wheels and underframe seems a bit too 'rosy'. From what I remember, the red used for the steam locomotive wheels was much darker, of course when it was still visible...see my next remark!
- The Θγ's were never famous for their cleanliness

Just add a tiny touch of dirt here and there to make it look more realistic! actually, I doubt it if even during the FS years Θγ580 was as clean as your model!
- Are you sure the specific locomotive you have chosen (580) hat the pump on the smokebox? Many of the ex-FS locos had the Westinghouse pump on the footplate (modified), fireman side...
Otherwise, top-level work!
CHeers,
Josef (Iossif)