Just out of curiosity, are these sort of upgrades feasible on K-Line's scale Hudson and Berkshire? I hear their motors are sort-of underpowered and prone to conking out under heavy loads. I have one of each (bought new when they first came out), and while I haven't even gotten around to running them, it's something to keep in mind for the future.
(but in the meantime, if they ever get their turn on the "test-track" in stock form, I'll configure lightweight, easy-rolling trains for them since I already have stump-pullers that can handle as many cars as the loop will allow).
---PCJ
