I just test ran mine on my host’s 0-72 mth ballasted factory roadbed and the engine and tender kept derailing on curves. Also the hinged footplate has a hinge that failed. Not so worried about the footplate but I am worried about the derailing,
My host’s 3rd Rail S-1 6-4-4-6 ran perfectly! I did notice the mth Realtrax has some very high tie plates!
Ever the optimist, I added the smoke fluid before running the engine I had it set on conventional and no smoke appeared.