Hello John:
Here is copy of Boxcar Bills post below . Now that I read it again, I think he upgraded the smoke unit internally by changing the resistor.
"The kit contains the 610-8057-200 smoke unit, new batting, new resistor, on and off switch, three pin leoco connector w/wires and funnel. They are for conventional running only. If i ever get a chance to complete, we have a few other goodies on the drawing board.
Bill