I think the difficulty to service/assemble them, the nice thick diecast shell is what did the model in as Lionel started cost cutting in the mid 50's. The later engines like the baby Hudsons that replaced the 2035 in those sets had a much thinner diecast shell, a simple drop out chassis. The 675/2025/2035 were more prewar in design other than the smoke unit. They are definatly a heavy weight and pull just as well as the Turbine. Hopefully I can score another inexpensive running mate for this one soon. Watching for a 681 Turbine or a 2343 powered/dummy. Never know whats gonna turn up! AD