Gary, the micro switch by itself can only drive the chuff input or the fan power but not both. Chuff input is a simple contact closure that grounds the chuff input. The TAS board did the work for that. If thats gone Mike will either have to use Johns board, or build a chuff and puff circuit, or use the micro switch to drive a double pole relay with one pole to the chuff input and the other pole to the fan.
I don’t think so, 3rdrail uses a TAS turbo smoke unit. He should be fine. The EOB is not generating the chuff, this is a post MTH lawsuit threat engine when they went to the micro switch for chuff trigger. The only connection between the smoke unit and the EOB is the power wire allowing you to shut of the smoke unit via the remote.