How difficult would it be to create something comparable to your LED lighting regulator? I am imagining a board that runs off 8-20 VAC track power and steps it to the correct voltage/current for a known value smoke resistor which would allow the smoke unit to operate at peak performance at all times. Perhaps it can have a transistor circuit to use the smoke input from the R2LC/RCMC to turn it on and off which would have the added benefit of not overloading the smoke triacs on older R2LC’s.
When I was still doing train repair, smoke units were one of the most common things I worked on. Everything from replacing cooked resistors to trying to improve smoke output on conventional engines as well as TMCC models. If a product like this existed, I could have sold hundreds. I can’t begin to count how many customers at the shop bought starter sets and complained of the anemic smoke output. I could have sold countless upgrades and most people likely would have sprung for the extra cost.
Not sure what your projects list looks like but I think this one could have some siginificant potential.