...but what I am sure of is that an s.bus capable solenoid controller is worth it. Switching to s.bus requires an inverter in order to use the serial port on pin 7. There's a software serial library that may let me receive inverted serial on pin 2 which is the same pin we currently use to read the rc channel. If it works we could flash new software to our Xiao controllers and make them work with s.bus. also, I've figured out how to calculate the required additional fuel for acceleration from one speed to another so a new firmware with acceleration and deceleration pumps is hopefully on the way.