Norton, that's the calmest Williams Hudson I've ever seen. What did you do to it to get it to go so slowly and smoothly? And it looks like the original sleuth smoke unit but I've also never seen one smoke like that.
Both the motor and gearbox have been replaced with a Pittman 8700 motor and Northwest Short line 23:1 gearbox driven by an ERR Cruise Commander. Will have to wait until I can run it on the club layout to see how many cars it will pull at what speed.
Swapping the gearbox with one with a lower gear ratio (higher numerically) is the key. I tried a number of motor swaps but couldn’t get it to run any slower than it did with the original motor.
As for the smoke unit, its stock. I have a few that smoke like that. I found Suethe fluid is the best for these and only use 3-4 drops. It won’t last more than a few minutes but too much fluid will cool it down too much to smoke. Also turn it off when not in use or it will burn up. Its now powered by the R2LC so I can shut it down with the handheld.