Bluerail app and TCS controller programming

I had a somewhat similar experience with a TCS decoder. I had two installed BlueRailDCC+Soundtraxx decoders which worked quite well and were easy to program with the BR app. I decided to try out a TCSWOW decoder. Programming was not as easy. I also detected a light circuit that was not functioning and sent the decoder back to TCS. They told me to get lost. Enough said.

Update: I've figured out a bit more. It's still rather complicated, but on the Bluerail app, the "Mute" button is actually "button 8".  Pressing this button once will mute sounds. Pressing twice in quick succession switches the buttons to control light functions only.

Pressing four times in quick succession actually works and enters voice programming mode. So got that figured out. My problem was not pressing fast enough in succession.

So I seem to have most of it programmed. Working on smoke now, which the TCS supports directly on board (even syncs chuffs to the chuff sounds using the EMF output so I can save the chuff generator for another project!) Only caveat is that it outputs around 9.5 volts (I'm feeding it 12V) for each output. I don't want to burn out my PS1 smoke motor and it used on board voltage regulation to keep it around 5 volts.

But since I'm running the heater separate from the fan, I pulled the fan leads off the board and plugged into a separate regulator. My challenge now is that the regulator is pretty large and I'm not sure there's room in the boiler. Anyone know if there's any way to isolate the inputs on the PS1 smoke board so I can feed the fan through the on board regulator and feed the heater through it's own circuit?

Thanks!