i wonder if controlling servos couldn't be done with two pulse generators and an SPDT switch for each servo connecting the servo to one of the two generators.    An NE556 dual timer could be used to generate a 1ms and a 2ms  pulses distributed throughout the layout (may need repeaters)

i'm assuming all servos could be driven to the same positions, like tortoise machines.

I have attached a PDF file of my modified software for Geoff Bunza's SMA30 WiFi Throttle. I am calling this V1.0 for my PC&N Ry.

I have added a heartbeat feature to keep JMRI from disconnecting the throttle due to inactivity. Also, auto IP configuration for my two WiFI networks, Optional send track power on command to JMRI on power up.

I added a power off/dispatch throttle option that is activated by having the direction switch in Neutral and setting the speed step to 60 or greater.

Hope this may be of use to someone.

Ross A

I have a few N scale vehicles similar to this:

https://woodlandscenics.woodlandscenics.com/show/item/JP5621

Can I power them directly using an MRC Light Genie without adding a resistor to the LED in the car?

https://www.modelrectifier.com/product-p/025000.htm

I have three relatively recent HO Bachmann Spectrum 4-4-0s.  In each I removed the factory decoder and put in a TCS WOWSound decoder and speaker.

Two of the three run fabulously well.  The third is very jerky, particularly at slow speeds.  I encountered the gentleman from TCS at a recent meet and he suggested the problem could be a capacitor across the motor terminals.