I have a MTH Imperial S2 Turbine (30-1308-1) that began life as a Protosound locomotive. Many years ago I converted it to PS2.
Now the PS2 boards were lost to a short circuit and kits are not available, so I decided to upgrade it to TMCC using a Cruise Commander and RS Commander boards.
During the upgrade from PS to PS2, I cut the trace on the smoke unit (SS100). Now that I am going to ERR, what do I need to do to the smoke unit? With twin 18Ω resistors, the smoke unit is 9Ω. There is nothing in the ERR documentation about the resistance of the smoke unit.