Of course, if they want to build a freeware Alco FA they're are very welcome to do so. Since DTM doesn't own the engine itself. As long as this one is there own work and they haven't copied anything from DTM they can build one if they want.
Long live the metropolis and big cities of the USA.
Amen to the C-420's. I know Rich will do an awesome job on the portion of the route that he is modelling but having seen 5 or 6 of those beautiful A&M Alcos pulling freight on that line, nothing else would be the same.