John, No they wind up in series. The first number is the part number.
This is Lionels super smoke unit. I think there is documentation about a patent infringement with MTH. It is wired to the R2LC and the smoke unit to allow for chuff puff! :-)
I think your method wants to leave the fan on at a low voltage and use your chuff switch, or a modified timer to pulse higher voltage to simulate the higher smoke output.
Since you are going TMCC and will have full voltage, the current PS-1 smoke unit will have the heaters on full. You may want to look at the MTH web site they have info on the smoke unit in the service area, and you can look at the mod done to the unit if you do a PS-2 conversion. It includes cutting a trace on the smoke unit.
The regulator may be a more elegant solution, though a $30 one, but no additional switches and magnets. G
