AlTerr developed U-Bahn Frankfurt first for Trainz, UF07, UF12, UF14 and then for Railworks also brings them into TSW, that would be something completely different. Look for a successor to AlTerr, it was a long time ago when he worked on the first version. Also bring in the historic U2, PtB, U3 cars as well as today's U4 and U5 cars.
